Just got a really great idea. I want to add floats not opticals to my simplicity and was using just the basic resistor trick on my ca alk dos. I will rig up a wiring diagram and post pictures to make a DOS to 2 input Breakout box later. Sometime this weekend for sure. Will also include the optical sensor instructions in there too (TRRS female). If you can find the part numbers for the other connection type, add to it @((FORDTECH))