Can I get the OEM wiring diagrams of Clarion 55T0 Android stereo?

Hello,
With regard to the 5 pins Green Connector at the rear of the stereo unit, I have identified the 5 wires.

3 wires are connected altogether to constant Ground.
One wire has approx constant 6.3 V when reverse camera is On, and 0V with camera OFF.
Another wire has approx constant 1.3V when the same camera is On, and 0V with camera OFF.

So, I assumed that the wire with 6.3V is for the source of power for the rear camera.
That means the stereo sends out this 6.3V to the rear camera to power up the camera.
And, at the same time, in return, the rear camera sends out Video Signal Output of 1.3V back to the stereo unit.

So, are my assumptions (power source and signal voltage) on the voltage readings correct?
Please share your experiences on these readings.

Okay, I have one more doubt.
1. Can a relay be used to switch the input video signal for the 2 cameras with only one camera active at a time?
2. Will not the magnetic field induced in the relay coil damages or distorted the video signal coming in pin 30 and to pin 87, and to the input video signal of the stereo when relay is activated?

You did not answer my question to point 2.

Alright then, here I attached a diagram without using relay to switch the video signals input source.

In this diagram, it has a 2 RCA input to 1 RCA out which connects to the stereo. Both video GNDs are connected together. And only one camera is activated only at a time using a single DPDT relay. Then, only video signal flows from camera to the stereo.

Now, my question is that say if the reverse camera is activated and video signal flows into the stereo, then, will this video signal have any affect or impact on the front camera Video Power wire although the front camera is off i.E. No power supply to this front camera?
Will there be a reverse signal flowing into the video power wire of the front camera thereby causing loss in signal to the stereo unit?

Please kindly elaborate on this.

Alright, let me take another simply analogy.

Say, my TV has only 1 input RCA port which means only one video source is available/activated at one time say CCTV1.

Now, I want to add second video source say CCTV2 to the same input RCA port using 2 input RCA to 1 output RCA splitter cable as shown in attached photos. I add a switch to the power supply side of the second CCTV2 so that I will be able to switch between the 2 CCTVs with only one camera activated at a time. CCTVs has 4 wires - power, ground, video signal and video ground.

The inner rings of the input 2 RCAs are internally connected marked as "BLUE COLOR" and through to the inner ring of the output RCA port.
And, the outer ring of the input 2 RCAs marked as "BLACK COLOR" are also connected together with the corresponding outer ring of the output RCA port. Hence, are grounded.

Now, that when the CCTV1 is ON, the video signal flows from pin 2 (BLUE COLOR) of the splitter RCA, and all the way to the inner ring of the output RCA, hence, displaying images/videos on the TV properly. But, at the same time, since the inner rings of the input RCAs are internally connected, the same video signal is also available at the pin 3 of the lower RCA port.

In this scenario, I have the following questions:-
1. Will this reverse signal voltage flows back into pin 3 of the lower RCA although the CCTV2 is not power ON i.E. Switch is OPEN?
2. Will this signal voltage of the CCTV1 have any affect/damages on the CCTV2 although the CCTV2 is power OFF i.E. Switch is OPEN?
3. Will there be signal distortion at the TV due to this signal voltage at pin 3?
4. Same confusion for CCTV1 when CCTV2 is ON.
5. If any affect arises due to this video signal voltage, how do I rectify this so that I can use any of the 2 CCTVs at one time using the same 2 in 1 RCA splitter cable? Will diode or capacitor etc works to BLOCK this signal voltage so that the signal voltage does not reach pin 3 when CCTV1 is ON, and does not reach pin 2 when CCTV2 is ON?