Right Side Bracket (Upper Cage) attaches to the Upper Cages by two included 15mm rods. The top rod has a special recess and 1/4-20 threaded hole to accept the audio breakout boxes AB-3 (Fujifilm GFX100 II), AB-4 (Canon C70), or AB-6 (Blackmagic FF), depending on which camera you have.
The included lower 15mm rod clamp attaches to the rear of the Upper Cage bottom plate by two M4 screws and locating pins.
Arrays of 1/4-20 and 3/8-16 threaded holes with ARRI accessory pins are available on many sides along with M4x20mm holes. The top front features a shoe mount for adding the optional Microphone Shock Mount (Hot Shoe).