Doesn't look as though M
r. K24power07 wants to share his secret! haha well worry no more

I just so happen to know that the power mirror feed is more than sufficient to run the lights/reflectors for signaling inside
There are two wire that need to be run to that unit. You'd need to throw in a third wire for the mirror motorif you choose to get the JDm auto-folding mirrors (
here)
Want me to draw a diagram? it may not help as much as you'd like but i can tell you what wires to tap into and where to run the power feed from. reality is, it's a OC swtich that runs off the command the signal stick gives. it is consistently powered and waiting for signal from the signal sticky thingy that you move up and down like a paddle