Just to let you know I have used the winch and I wish I had bought one years ago.
From clipping on to being fully on the trailer 44 seconds! I find it amazing such a small compact unit can drag the boat up so quick.
I use a large plastic battery box with the control box and battery fitted in it. I fitted Anderson plug/socket just after the motor. The main length of cable coils up and fits in the battery box when not in use.
When I want to use the winch I open the tailgate, uncoil the cable plug into the motor and away we go. I use a 45Ah battery that I keep charged up using a auxiliary (grey) towing plug wired for the battery charging circuit so when not in use I can just unplug and store.
Hope the info is of value, any questions just ask and I will try and answer for you.