This picture is from the Finescale On30 Yahoo site, I failed to put down who's it was, very nice.
Stock Connector Location
After Relocation
If you want to take the cab off of your C-16, here is how I do it
Slide a razor blade under the cab at the corners and cut off the seats holding the back of the cab. Do both sides.
Wiggle the cab as you pull up to free it from the front lugs. I reduce the size of the lugs so it is only a snug fit for future removal
The area circled is the base of the seat. The cab will snap back on, the C-16 in the after Connector Clinic photo has no back lugs and the cab snaps back on fine.