Help with adding ECC-50/100 to Notifier NFS-320

Hello all
Was hoping someone might be able to help me with adding a ECC 50/100 Voice Command Panel to a NFS-320 FACP. I know I run my voice loop off of terminal TB20 (Primary Speaker Circuit1 ) 1 & 2 then I think I think I run cable from a NAC Terminal B- and B+ on the NFS-320 to the ECC-50/100 panels TB4 CMD1 Terminal input +,- and then the NAC cable going out to field devices is on TB4 output +,- I’m not sure if I’m right on this though and I’m confused if I have more then one NAC loop with Voice strobes then what. If anyone is familiar with this wiring I would love some advice/help. TY