Somebody replaced engine and transmission using what appears to be household electricals

Somebody replaced engine and transmission. I am embarrassed to say they used what appears to be a household electric, toaster, TV power wire to use as the ignition wire. So, you now have a idea of what I am working with. I have two questions,

1. The Control Module;ECM, BCM the one under the dash, seems to have been spliced to an ignition wire, I have no idea which wire should be spliced, if any at all, should be spliced.

2. I cannot seem to find the fuse for the clock, digital clock radio. The hazard lights and the rear defrost work on that panel but I do not seem to know where the fuse is for the clock.
I do have a third and final question,

3. This little V6 has power that I cannot believe but I have low end torque and high and torque but the mid-range is poor, probably a fuel-air mixture problem but if anybody could recommend anything. Plugs have been replaced all of the electric, all the wiring fixed the t coil packs have been replaced or are working fine. I have injectors for it but I do not want to fool with putting fuel injectors on unless I have to. If anybody has had these kinds of problems please answer any of the questions. It will be greatly appreciated. Thank you