Yep - what he said.
I actually used a brand new Golden Tee ball with an Opti-Pac on my cab, and it took maybe 15 minutes to wire the whole thing. It was a simple matter of:
1. chopping off the big, clunky plastic connector that held all the wires together,
2. stripping a bit off the exposed ends, and then
3. following the very clear directions on Ultimarc's web site to screw the right wires into the right sockets of the Opti-Pac.
I think I might have had to switch a wire here or there to make sure up was up and down was down, but that's a piece of cake.