I was cleaning an electrical connection on my 1985 w123 300TD behind the valve cover and it crumbled in my hand. The wires run down to something on the fuel injection area. my problem is that it plugs back in in three different ways. see photos. The female side has a dimple but the male side does not. so I don't know which way it needs to go now. what it the part called that I goes to and which way shout I plug it in?

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Rick Keeling