Stock DEA355 radio wiring questions....

My headunit went out of commission last week and I bought a replacement. I pulled the headunit out, but the wires are not the corresponding colors that are on the newer wiring harness. There are 8 yellow and black wires (assuming these are the speaker wires, which are not labeled on the right side). On the left side I have a brown wire, red, orange, white, cable. Does anyone know what these wires are exactly? There is also a plug in type connecter cable on the right side. The truck is a 12' Kenworth T700.

 

For anyone else that may run into this problem. The wiring harness
Metra 70-1784
was a direct plug and play.