Hello, how do you put the electrical plug onto the 722.355 trans. It looks like this white plastic thingy slides abit but it is still not going on? what am I missing?

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more pictures? went and tried again??? I give up for this evening.

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I 'm thinking maybe it should look like this?

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is a Rotating Lock (NOT VERY FAR,15 to 20 degrees) for the Female Electrical
Plug.

That device is the "Back Up (Reverse) Light switch.
(also know as the Neutral Safety Switch.[Starter Non-Repeat] )

The Picture in your post #1 shows the correct orientation of the Switch.

The Pictogram shows the correct orientation of the "White Plastic Locking
Device."

EDIT:
emerydc8 's Pictures #1 and #2 in the Link he posted are far superior to the
monoscale pictogram!

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'84 300SD sold
124.128

Once you get it on, you may want to ensure it is properly adjusted. I just went through this a few months ago and it is not very difficult. Here's the link.

http://www.peachparts.com/shopforum/tech-help/306508-replaced-nss-now-no-reverse-lights.html

If you are having difficulty accessing the switch (I know the space in the transmission tunnel is minimal), you can put a jack with some wood under the transmission pan, loosen the mount and lower it a few inches.

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1993 400E, 256,000 miles (totaled)
1994 E420, 200,000+ miles
1995 E420, 201,000 miles

Got it...It was the combination in the picture in my post #3 or emerydc8 has a pic of the same thing on his pic #2. I could not get his pic#1 to open. ....anyways there are several combinations that this plug appears to have but only 1 that works so the pins line up correctly where you can lock it on. The white locking ring fell off mine and so I had some fun with trial and error to get it correct..all is well. Thanks.