Look for the Jaboni stickers. The wiring will be nearby.
Inside you control panel you will find the grey communications cable that will go to the MPPT you will install, or not if you go Victron Bluetooth devices.
The wiring is rated for 30A (10 gauge). In you battery compartment you will find the 30A inline fuse wiring.
Jaboni/Montana solar prep
https://youtu.be/mhE9pSum_nA
Jaboni/Montana solar install
https://youtu.be/gn3BIWaSb4c