Fits on the centreline just ahead of the wand pushrod support - try to get it as far aft as possible whilst still being able to insert & remove the pin. I attached it to the boat with 3M dual lock tape.

I've added a second version (the v2 files), which is slimmer and slightly lower to give more clearance for the vang lines. It also has cutouts inside to hold M4 nuts for the Velocitek bracket.