No Sound After Fixing Bad Wiring at the JBL Amp

I have a 2014 Platinum with the stock JBL Amp. I installed a Sony 9500es and only the front speakers were working. After looking under the seat and noticing that the factory JBL amp had butt connectors and wiring not connected on two out of the three plugs. I decided to lift the seat and solder everything back together. I purchased new plugs with the wiring from Auto Harness House. Due to time constraints, I could only solder back in the middle plug. I buttoned everything up and quickly tested the radio. All my speakers worked. I was stoked. A few days later I began to fix the last bit of wiring on the plug closet to the front of the truck; the one with the two negative wires. I soldered the remaining wires, went to test the radio, and there was no sound. Not even from the front speakers that are powered by the Sony. The Sony turns on and connects to Apple Car Play and my apps. It just isn't producing any sound.

Any thoughts?

 

Hears a picture of the rat's nest.