Should be . 156 connectors. Most people recommend using trifurcon molex connectors instead of IDC connectors. Marco sells the connectors and and new plastic housings. I have found that a ratcheting crimping tool works best. Connections are tight and professional looking. Only strip Avery small amount off the wire or it will protrude out of the back of plastic housing after the crimp instead of being in the plastic. Do one wire at a time so you don't mix them up.This is very important. You should be able to find a tutorial on you tube or Pinside .