I took a bit of a risk because there were no reviews when I bought the clip but it works as expected. Luckily I can still add and remove a DC power cord. The port is not blocked. However, I have thin fingers, people with big hands might need something to help them turn off the DC. The cable holder itself works well. It's a little clunky when you first put it on, but once twisted it feels solid and the cables don't move under quite a bit of tension. One tip I learned was to connect the wires first, then thread the clamp through and screw onto the cage. It won't really work if you leave it on the camera all the time, but I wouldn't recommend this as the camera's rubber flaps can't be easily opened/closed with the clip attached. I attached it to a SmallRig 6k Pro Cage.
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