Found that the vertical card compass was being affected by the engine oil gauge so I swapped it with the VSI and it appears to work fine in that position. Applied power to the voltmeter which is next to the compass and it doesn't cause any change in the compass reading. Hopefully it will still be ok when everything is powered up.
Connected the 5 indicator LEDs to power and verified they work and I have the right colors in the right holes: Max Fuel = solid red Clutch Disengaged = flashing yellow Clutch Engaged = solid green Starter Engaged = flashing red Engine Oil Press = flashing red/blue
