Its just a normal female PAL TV plug, if its on the RH side of van its for an aerial without a booster, like at some van parks where you use an extension cable to plug into their system because no reception otherwise or you want to plug in a normal TV aerial ........... the plug connects to the wall plate assembly inside but no need to switch on the booster which would disrupt the signal.
You can find male and female plugs, patch leads to suit, there are even adaptors for some cables which have the same socket on each end, you can even find adaptors to go from the PAL plug to the F type plug which is the screw on type..... most DVD players have this plug to connect to TV's....
Bunnings/Mitre 10 have a whole nest of them...
Male plug.....
View attachment 68707 ......................... Female plug.......
View attachment 68708 .. and where the cables have 2 male fittings, (most annoying) there is an adapter which neuters one of the male fittings ...
View attachment 68709............. the screw on type is an F fitting...they also are male and female, no other Gender involved other than some can be called Bastud........... also a fitting that will take a PAL, one end and an F the other.......
View attachment 68710... I just buy some fittings and 75ohm cable and make my own, its very simple to do..... cheaper and easier of you want to pull apart and swap a fitting.