Canon EOS 5D Mark II Instruction Manual - Page 7

Installing the Camera Remove the back from the housing. The mounting tray for the camera is secured to the housing back. Position the camera and lens on the camera tray, and then secure it with the mounting bolt which threads into the camera's tripod socket. CANON Use a flathead screwdriver EOS (recommended) or coin to 5D tighten the mounting bolt so the camera bottom is flush against the tray. Mark II Note: Conversion Circuitry Strobe ID Switch is located on bottom of camera tray. Camera Tray Mounting Bolt Setting the Conversion Circuitry Strobe ID Switch On the bottom of the camera tray is a switch for setting the DS Substrobe ID. Set the switch to the Model of DS Substrobe being used. When using dual strobes of different models such as a DS51 and a DS161, set the ID switch to DS51 or the smaller strobe. Strobe ID Switch DS 5800/51 DS 112260050/161 Set DS Substrobes to TTL Mode 7