Grey,
Why is the light socket impossible? Pictures of it could help?
To open that controller isn't hard, it's getting it back together that hard cos you need three hands. Well, maybe not.
The screws on the side of the pedal have to come off. Then the pedal will come off. Watch carefully which way things move as they come off.
Then pop off the little clip off of the holy top. It will raise up and the hook on the other end will pivot out of it's slot.
Then you can see inside. The wires just attach with screws so it's not too hard to do them.
I've had one of these apart, then back together so I'm running on memory. The person I got it from later found the machine it went to and needed it back so I never did use it.
Joe