There's black cylindrical case on the drivers side engine compartment on the sidewall panel, If I remember right is about 5 inches long and about as round as a silver dollar. It has a plastic lanyard attached so as not to lose the top half when you unscrew it. When you get the top off, the female connection should be inside this piece. You have about an inch of room to grab on to this piece and pull it out. It will take some effort, but will come out if you have a decent grip. You will see on the bottom that there is a white waxy silicone substance on one end. Put the rubber bands in between the two parts and screw it down fairly firm. You may have to test the tightness + or - till it works just right.

Anyway this worked for me. Good luck

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David Dodge
1982 300D Turbo Mercedes
1948 Willys Jeepster