im sorta using consumer plugs as a guide. they have 4 parts. the housing thats mounted on something, a plug housing that fits in the mounted part, and two electrical connection bits that fit inside the other two where the electrical connections are held together.

i started on the mounting housing. it will sorta have a groove for a ring to lock it in. so i sorta split this one into two parts. its not physically adaptable to be mounted on different thickness of stuff but i figure since these will be printed for specific jobs the model could be tweaked for each printing.

http://sketchup.google.com/3dwarehouse/details?mid=1e6168ce35794c39b38804396e417a9b

thats what ive got so far.