so I was having trouble getting the battery into my bass with the preamp and a wire came undone from the battery hook up. I thought I knew where it went, and soldered it back. Now nothing works. HELP my ineptitude. I'm an idiot when it comes to wiring things. The red wire from the battery is what came off. I soldered it back to the spot you see in the picture. The small black wire going back over the preamp towards the bass is hooked to the bridge ground. The connection was starting to come loose so I resoldered it back into place (in the exact same spot). If you need more photos, let me know. I need to get this fixed soon!