The following diagram is clipped from the Dexter catalog. It shows both the 7-pin and (rare) 9-pin connector, but I didn't want to cut off the caption...
The 7-pin diagram agrees with the one in the FiberglassRV Document Center, but I think it is important to note that they are shown from different sides of the receptacle
. The Dexter view is looking at the contacts where the plug goes; the one in the Document Center is looking at the other side where the wires attach: so they are mirror images of each other.
I assume both are right, as I have yet to find a published diagram for this connector which is not consistent with all the others (a good reason to use this style of connector, in my book...). I have
been caught by the mirror-image problem, though.