Popped open the led light in the back of the hardtop to look around. We are installing the antenna and have to run the wires through the hard top. Found a few wires not connected to anything looked like speaker wires and some other black and blue pair. How can I find out what’s been prewired for? Thought I had most options so seeing additional speaker wires means there should have been speakers or that I can install them aftermarket? Wondering what else is prewired in this boat. Any advice?