Transit Duo with 5G BR Mini Antenna Set Up

I just purchased a 5G Mini to give us 5G capabilities. I currently run two Mobility 40G antennas, which I use LTE 1 + 2 on each Antenna for the Transit Duo. The antennas are located way up in the ceiling just below the sunroof which is fibreglass, on port and starboard sides of the front of the boat.

Im wondering if I should keep this set up and use LTE 3 + 4 on Port and Starboard antenna to plug into the BR 5G mini, or give that one a dedicated antenna, and the transit duo a dedicated antenna.

Appreciate your thoughts!