I installed on the port side because I have my batts and wiring on the starboard side, and I wanted to balance the weight. My fuel filter and remote oil tank are on the port side and I didn't want to have to swap everything, although I would have preferred the kicker to starboard because the tiller and fuel inlet would be to the centerline if starboard mounted. On the other hand, I think those steering connectors (that I don't have) to the main motor, require the kicker to be mounted on the port side.

Look at my pics and you will see that I only had so much room to mount cause of my bracket-like transom.

I taped a yardstick to the hull to extend the plane of the bottom. The mounting instructions are good, but I disobeyed them by lowering the kicker 1 inch, because I wanted to be sure of a good prop bite in ocean seas. If you are in relatively calm seas most of the time it is nice if your kicker doesn't touch water when you're on plane with the bracket in the up position and the kicker not tilted.