M'kay, I've got this HUD from a 92 SSEi sitting in my lap, I'd like to add another LED output to put on the defroster panel within camera view. How would I go about figuring out which wires to tap/if it'* possible? I have two complete HUD'*, so maybe if I could paralell them on the signal input line and simply replace the LED on one of them with a traditional 1" tall segmented LED board or something...

Maybe split the signal to the HUDS, so it'* like a Y connector, and put a mirror on the HUD so it'* still readable the right way, and in view of the camera. You could maybe velcro it to the dash whenever you need it.

the HUD display is upside down and backwards, plus it'* only about a 1/4" tall...