I got a 1974 914 with a custom (homemade) wire harness.
So nothing matches the 914 schematics.

The headlight pop motors were not hooked up.

Looks like a Red, green, Grey(or black? grease?) 3 wires...

Cant find a diagram that shows something like:

Red=+12v always on?
Green=+12 with switch only?
Grey/Black=Ground?

Anyone know what these are?

I would like to take a car battery and bench test these motors but I dont want to fry them in the process or cook the little round relays that are dangling attached to them either.

Grey and green control the up/down motion. Power on one goes up power on the other goes down. I forget which is which. Red is power all the time. Both grey and green get power through the switch that comes from the ignition on.

How your headlight motors work.

This describes the functions for you.