Finally got it all up and running on one of my trusty Hannay reels.
Managed to fix the motor to the frame of the reel too, so that it's a complete unit when I move it around.
It works great and saves a lot of time and energy. The only problem I had was when it got snagged when reeling in and it blew the 20amp fuse I had. Changed that to a 30amp now and be more aware of snags.
I have just ordered another set for my 2nd reel.
Thanks everyone for sharing their findings.