The ENH210EXT is a 2T2R design, and as such would need 2 MIMO antennas
with similar radiation pattern or a single body 2T2R MIMO antenna with
twin connectors for it to work properly. If the 2 antennas are
directional, then they need to face the same direction. 

See 2T2R MiMo antenna samples below:



The ENH210EXT has N-Type antenna connections. Some external outdoor
antennas do not come with the same connector type. Therefore, you would
need to purchase a separate cable assembly that would fit the connections
of both the antennas and the ENH210EXT.