Hello, new to this whole Home theater stuff. My house is prewired for home theater speakers, there are 4 electrical covered boxes (two from wall two rear wall) with the speaker wire in them, all leading to a main electrical box where I'm going to mount my TV. As far as my home theater unit goes, i'ts a costco purchased Sony 3D, Bluray 5 speaker system, plus bass woofer, it makes it nice for someone like me to hook up, colored connector with wire for each speaker wire with colored connecter. Now I want to mount the speakers to the wall where the electrical boxes are, How do I mount them? and how would I hook all the speakers from the main box to my system, the wires a much thicker and really would work in my system because it has the colored connectors. I'm thinking I may need to splice the wires together so that I can plug them into the system. What hardware will I need ?