IF (big f'ing disclaimer) it is like other govs of similar design, you loosen the screws on the top and the mechanism/interfacing hardware rotates within the body. Check that install manual or call MT but it certainly looks like the other products in the market.
Cable control bracket should be reversed with the cable tab towards the firewall. You would probably be mounting the bracket using the 5/7/9 o'clock screw positions.
Ralph,
I believe I have it correct. The bracket is designed so the cable passes through it. This allows for a larger radius sweep of the cable from the firewall penetration. Here is a picture of another install