Connect 2 RRUs to get 4T4R

Anyone tried to connect 2 RRU’s (each one is 2T2R) to get 4T4R?

Some guys in US are using for FWA.
But is necessary to be carefull about antennas polariation setting for improve rank 3 and 4.

Yes cabling for MIMO is very important in LTE when cables are not connected to the right antenna port and polarization.
But in 5G we don’t have this issue anymore.
As there are no more feeders between RRU and antenna.