I am looking to install a TZT12F at my upper helm. I have the mounting dimensions from the installation manual. This shows a depth of 115mm and a clearance behind the unit of 150mm. The install is on custom navpod with a sloped front and back - so it has a trapezoid cross-section. To avoid stressing the cables - what is the maximum radius I should install the cables at? Do I need the full 150mm clearance behind the entire unit? This will be the slave unit on my system. The chart master unit will be installed at the lower helm - if that makes any difference. The face where the TZT12F is to be installed is 265 x 410 mm. See attached pdf for the navpod.