Which connector? The one that goes through the firewall is a multipin ( maybe 16), the glow plug end is only 6. The rest are somewhat directional in how they go on.

This harness was really buggered- the insulation would crack off the glow plug lines by simply rolling it between your fingers. The temp sensor up by the thermostat was grounded against the fuel lines! I didnt bother checking impedance, it was non serviceable. Although the car ran quite well when warm. Terribly when cold though.