I have a 1984 300CD with euro headlights and a 1982 300CD with US spec headlights. I want to switch the euro headlights into the 1882 and the US headlights into the 1984. (Don't ask why)

I put one of the Euro headlights into the 1984 car and I'm not sure about the electrical connections. This 1984 car which has the euro headlights, seems to have two different connectors. Is there some secret to making this switch? The electrical connections seem schizophrenic.