I've got that exact same plastic, it's kinda thin for what you need. you might want something a little thicker. and yes you do need to solder those wires on. i desoldered the connector on mine and stuck the wires through the holes and then soldered them. also, get some really thin solder and some flux, if you dont already have some, it'll make things easier. i use .015 dia. 1.0 oz silver bearing solder from radio shack. i think the solder is item # 64-035 E, incase you are ordering it online.