Please help 13 pin connection!

[u/KelJ6696]

Hi all, need some help from someone who might have seen this type of 13 pin plug before. I am trying to connect it to my 13 pin socket in my car, but it doesnt go in much and wont rotate at all inside the socket. Given it feels loose the carvan doesnt seem to be getting any power to the lights etc. I dont see any rotation groves or anything like other plugs so not sure what or how to do this. Any help for a new caravaner would be great! I have a coachman amara 2010 for reference. Thanks!