How does the relationship between antennas and the eNodeB work in a MIMO (6x6) setup?

Hello experts, I am an enthusiast in the world of telecommunications and I am studying LTE. I have some doubts about how MIMO works. Considering a distributed eNodeB (BBU + RRH) with MIMO 6x6, connected with 3 antennas (2x2), how would the throughput be distributed for each antenna?