BTR-T Iskatel CSAT versions are able to be placed in the mission editor, but is not visible for Zeus to place
This affects both original and pacific CSAT factions

O_APC_Tracked_03_30mm_lxWS
O_T_APC_Tracked_03_30mm_lxWS

Or, if lowercase L is not correct, here is uppercase i

O_APC_Tracked_03_30mm_IxWS
O_T_APC_Tracked_03_30mm_IxWS