All communications, Serial and Ethernet, are wired directly into the Control Boxes and connected to the cMT3106XM via the 6 meter or 10 meter tether cable.
The IO is on the inside of the front panel on the cMT-XMBS Standard Control Box and the wiring is all directed out the bottom, through the cable glands. This control box is designed to be mounted on a wall, or the outside of a control panel.
The IO is on the back side of the cMT-XMBC Compact Control Box and all the wiring is directed out the back side, directly inside the panel its mounted to.
Refer to the Installation Guides for more wiring instruction: