Use this HDMI cable clamp from SmallRig to protect the HDMI cable when connected to the camera. It attaches to the upper left side of a compatible SmallRig L bracket and securely holds an HDMI cable to prevent accidental disconnection.

The clamp works with the 2122 L-Bracket (2019 version) for Sony a7 III / a7R III, the 2236 Arca L-Bracket with Half Cage for Sony a7 III / a7R III, and the 2258 L-Bracket for Nikon Z6 / Z7 cameras. It locks onto the L bracket using the included 1/4"-20 screw and holds the HDMI cable in place with a single turn of a screw.