This HDMI Clamp Attachment for Canon R5C connects to the side of the R5C Full Cage and allows you to secure the optional HDMI to Micro HDMI Adapter and an optional USB-C Cable.

This will help prevent these cables from coming loose when shooting and will provide additional protection for the ports on your camera body.

This can be specifically helpful when using an external recorder as a loose cable could very possibly ruin a take if accidentally disconnected.