What I found useful was simple masking tape. I labeled each of the connectors so that when I replaced them, they all matched up. Of course you could use whatever work, actual labels, color stickers, whatever, just so you get it back the way it was.
As with any new product, there are always a few bugs to work out....I had all but given up on our tank system until I actually saw it work as it should the very first time after being at Jackson Center....maybe they re-flashed the new display unit with a Palm, I don't know, just a happy camper now that I can stop guessing how much fresh and grey water is in the tanks. Black, though important, I can see manually, not the best exp in life to do, but now an non issue since the black tank sensor works perfectly now too.