Gauge calibration

I had to remove the dashboard in my vehicle to replace the heater core. I took the instrument cluster out I wanted to see about changing the light bulbs they were soldered in. The gas gauge has not been reading right. You have to remove the indicators to expose the face of the the board. I lost it in the settings there is a gauges I thought had the motors in a zero position, but it obviously was not when I installed it and turned the car on. The tachometer did not work at all the speedometer bottomed out below 0 mph. The temperature seemed close. What do I do?