SmallRig HDMI&USB-C Cable Clamp for BMPCC 6K PRO 3271 works only with the new cage SmallRig Full Cage for BMPCC 6K Pro #3270. It locks onto the left side of the cage via two thumb screws to secure HDMI and USB-C cables and prevent signal interruptions during filming. Besides, it comes with a hex spanner to help ensure secondary fixation.