I had originally tried to use a couple keyed hots from the lean burn wires itself that go to where the computer used to be, They would't put enough power out for what I needed. Then came the dark blue wire (we all know how that went lol), the only other factory keyed hot I would know to try is the alternators keyed hot, and now that I think about it, that might be that dark blue wire (im pretty sure it runs to the voltage regulator too? Memory isnt serving me too well atm). A local guy said to use the keyed hot from starter relay but as previously stated there isn't one on mine