Your going to need to find your control lead, and splice into it, its a blue wire, but i never looked at my stock H/U so i dont know what it looks like, but its a solid blue wire, that hook into your amp, and tells it to turn on. then hook up a battery cable to your amp comming of your battery. Now, Your wire cut off of your rear speakers need to connect to your amp, not the subs, idk about an inverter, it should work going straight to your amp. the amp should have inputs for these, Right and Left. the control lead should be lable R somthing, i forget. then connect your amp outputs to your subs.