5G Antennas Connections on the Balance 310 5G Hybrid

There are 6x SMA Cellular Antenna Connectors, 4x for 5G, and 2x for LTEA on the Balance 310 5G Hybrid.

What are the correct set of antennas for the 5G radio?
Are two SMA meant for the low frequencies MiMo and the other two for the higher radio frequencies MiMo?

We are planning to use Poynting antennas for the low frequencies MiMo.
Any recommendation for a marine antenna for the high frequencies MiMo, preferably a rod antenna style?