pioneer head unit

Alright so i jus finished wiring my amp in my Jeep Grand Cherokee,  My RCAs and my Remote wire were already ran (so i thought)  so all i had to do was run my power wire and sand down my ground connection. So i hook erything up and start it up and what happens, nothing.... so i double check my power connections, everythin looks good.  I figured i had to check my remote wire from my head unit which was already installed when i bought the car.  I took apart my dash and pulled out my head unit and sure enough the remote wire wasnt connected nor the RCAs.  Ok.. connect the remote wire and RCA's.. Sounds easy enough untill HERE IS MY QUESTION:::    I have a Pioneer DEH-7800MP  Reading up on it says it is sposed to have 5 Pre-outs.  Well call me crazy but i dont see any pre-outs on this thing.  All i have is a couple Pin input slots, my IPod Aux  input, my harness slot, and my antenna wire.  I never seen anythin like this but it looks like my head unit is sposed to have a seperate wire that plugs into one of these pin slots that connects my Pre-outs.  Rather then having any direct inputs into the back of the unit?  Am i missing somthing?  Any answers would be great. 

Thanks