Sorting out someone else’s wiring

I’m installing a new head unit into my 2nd gen DCLB (no JBL kit). The truck previously had a Bluetooth phone system installed which was a black box that sat behind the driver side kick panel. It looks like the harness that goes from the head unit to the connectors behind the kick panel have been modified significantly and I’m not sure how to restore everything to the way it was. Toyota wants 5k for a new harness and won’t sell the just the segment I need. So I’m on my own.

I’m going to have to either hit up a scrap yard or try and find the right connector and re-pin the wires. Either ways I need to know what this harness is supposed to look like. Does anyone have pics of this harness that goes from the head unit to the drivers side kick panel?

 

I would find the installation manual for whatever was in there and reverse on that.