I have a Blaupunkt Heidelberg and an empeg that I'm installing in my Jetta. I've already wired up the wiring harnesses, and the heidelberg and empeg both turn out and work fine, and the heidelberg works great on CD, AM, and FM. The only thing I have left to do (besides actually install the units in the dash) is feed the empeg into the heidelberg as aux. The empeg has its 4 RCA, and for the heidelberg I'm going to need an aux input adapter it seems. However the one on their website just has a male miniplug thing... is there one with 4 RCAs, or should I get an RCA to miniplug adapter or something? Am I going to lose two of my channels? How should I hook this up?

Thx