Hey Terry!
Hopefully you found that tank, as mentioned you likely need to raise that wheelwell cover. And as I discovered you will probably need to install the sensor strips for the black and grey tanks on the driver's side of the unit since the tanks are likely deeper on that side.
As far as wiring, each tank now has a dedicated wire to your existing KIB level panel. With the SeeLevel system you use a "common bus" which is accomplished by joining the wires together at the new panel. I took a slightly different path, I used one of the tank wires and connected up a propane tank gauge so I can monitor it since it was not included by Jayco. Then I just extended one of the other tank wires for its SeeLevel sender. Just need to remember what color went where! No new wires to the panel making wiring one of the easiest parts of the install. I also installed a second display panel with pump switch in my wet bay. That was probably overkill!
I am very happy on how it worked out, the system works great. I also "cleaned up" and better insulated the areas while I was there. There was nothing over the the wheelwells, now I have 2 layers of Reflectix insulation there. Also put rigid foam board under my grey and black tanks.
I am happy to pass on anything I might know, heading out today to Maine but I will have email. Just ask!
Link for propane sending unit:
https://www.google.com/shopping/prod...VZBB_oQgTYI_gE
Link for SeeLevel system I have:
https://www.garnetinstruments.com/pr...onitor-system/
Link to my pictures:
https://www.jaycoowners.com/forums/m...lbums1497.html