1. Cut off the end with the cap (some have been able to just pull it off, I had to cut mine) I use this end for the tail mount.
2. Cut a little bit off of the end with the taper. If you use this end for the side that goes into the heli you dont have to cut if flush, just make it big enough to get the wires though.
3. You will need a 7mm (someone correct me if I am wrong) drill bit to make the inside of the needle big enough for the mount, then drill a little hole for the screw.
I might make a "How-to" with pics the next time I have to do it. But its easy, you shouldnt have a problem