https://m.youtube.com/watch?v=c1biQ5Svo2w I installed a Husky Brute this fall. Mine is the 3500 model so the level didn't come with it. I think the level mounts over the hole where you access the shaft for manual operation with the hand crank. If that's the case, I wouldn't use super glue.
I didn't use the circuit breaker that you show, even though it came with one. I ran a wire back to the fuse panel and power it from there, rather than directly from the battery, so it's protected with a fuse. Works great. I also mounted a 7 way connector to the trailer chassis and plug the Jack into that. Now, I can also power the jack from the tow vehicle if need be, as I remove the trailer battery, when I put the trailer in winter storage.
Here's a link to a YouTube video that I made explaining my install. Hope it helps.
Sorry, I did something wrong, the link is at the top of the post.
https://m.youtube.com/watch?v=c1biQ5Svo2w