door locks on ungo sr5000

i am seriously considering purchasing an ungo sr5000, but i am wondering about the wiring for the locks. My '87 porsche 944 has manual locks, and i am wondering what kind of relay wiring i should use for this alarm. I am 16 and i am most definitely competent enough to install it, but the alarm has 2 wires that switch outputs from - to + depending on if it is locking or unlocking (i. e. lock a="+"b="-", unlock a="-" b="+") is this a situation where i use a 3 wire relay setup? i know that i need to use relays, because the installation manual for the alarm says that and little else install. manual (go to page 18) thanks

you have actuators also right...?

i am going to get them, and most of the ones i see are 2 wire, is that the best choice? i am trying to keep the system as cheap as possible without sacrificing too much