This figure shows three ACSs to be merged, numbered from left to right as you face them from the CAP side:
ACS 0:
LSM 0,0
LSM 0,1
LSM 0,2
LSM 0,3
ACS 1:
LSM 1,0
LSM 1,1
LSM 1,2
LSM 1,3
ACS 2:
LSM 2,0
LSM 2,1
LSM 2,2
LSM 2,3