On my Navico, the socket is flush with the deck. Whenever the unit is not in use, I disconnect it from the tiller and stow it in the port side cockpit locker. Thus, the swim ladder is not at all blocked, though happily, I've not yet felt the need to use it!
On my boat, a starboard side mounting would make it cumbersome to get to my 5 hp Honda to adjust speed, etc. BTW, because I chose to use a water proof deck plug/socket to power my unit, I removed the Navico plug and installed the water proof plug. This was a little tricky as there were several wires to choose from in the unit's electrical cord. Presumably, your new unit came with its own female socket, so that should not be a concern.
I also had to get a lowering bracket for the post to which the unit's control arm attaches to the tiller. This was needed so the unit would be level at zero heel. I considered through bolting the bracket to the aluminum tiller, but decided instead simply to use stainless hose clamps. Those work perfectly.
I was concerned about powering the unit, because we are frequently becalmed in South Louisiana and for long motoring passages no one wants to be married to the tiller. I installed the alternator kit on my little outboard and it keeps the battery up for those long runs. You'll find, once tuned, your tiller pilot will use very little power as it only moves when necessary, and mostly is idle.
Take your time to consider your installation and you'll be very pleased with your purchase. I wouldn't own a boat without one.
Kind regards
Hugh Straub