
There is a screw down the inside of the buffer tube. Just unscrew and put it a side. You will have to remove the gear box to fish the wires up and through the opening were the tube attaches to the body. In the buffer tube there should be a 3/4 round washer or a washer with a slot cut out on it. Pull it out and then fish the wire through the tube and screw it back on. You should be ready to hook your battery up.
Hope that helped, without having it in my hand to see exactly what you got going

Hope to see you on Saturday.
Merry Christmas,