Solder them to the male connector, taking note to connect the corresponding wires to the blade end. DONT FORGET to slip on the nut into the wires before soldering.
Assemble the insert. like this. the board just fits into your insert and the back chassis half.
Slide the insert into the front chassis half with the back end of the insert flush with the back of the chassis half. NOTE the notch. Align the male connector notch with your blade and tighten down the nut in the insert.
I used one of the existing recessed holes in the chassis to add a small screw to hold the insert in place.
Assemble the back half of the chassis and tape it back together. Don't forget to slide your switch wires through.
Assemble your hilt. Might want to test before closing it all up.