s13 rhd drive bmc question

[Corvander]

I found a rhd bmc for my ka-t but it has 3 ports? it says non abs and my car had abs and only 2 ports what's the deal here

[Firestorm]

non ABS MBCs have 3 ports as a fail safe, so that when one line loses pressure (in case of an accident where a brake hose breaks), there are still 2 other lines that can build brake pressure.

on an ABS car 2 lines are enough, because the abs distributor block thing splits 2 lines into 3.

[Corvander]

ok which ports should I use on the rhd one