Ernie, On the 789-44 there are terminals to hardwire the IR receiver output to the block. Out of the powermid receiver jack the tip is + and the ring is - and it is a mono mini plug. Attach the + to IR in and the - to ground on the 789-44. Nothing to the 12v and the status. The output of the powermid is designed to power a blaster so you should put a 470 ohm resisor in series with the + connection which will limit the current. Use the Xantech power supply 781RG to power the block.