Heavy duty video users discover one thing about their DSLRs: they weren't made for heavy-duty video use. Nowhere is that more evident than in the connections. If you are even remotely sloppy with cables, you'll eventually trip over or entangle one, putting lots of pressure on the camera-side connector. It's not unusual to damage the camera connector, which turns out to be an expensive repair.
Accessory maker LockCircle created LockPort800, a plate/adapter system that moves the cable stress point from the camera to the adapter, and which is cheaper and easy to replace than having the camera repaired by the maker. Forward and rear facing versions are available. US$120