Connecting a BT disc to my computer, which has an RJ45 port rather than the traditional type

[rbz5416 · Accepted solution]

That's  a compact RJ45 for use on laptops. The bottom will hinge open to provide the full size socket.

Or as it says in your pic, "flip down". 😉

[RobinHewings]

Thanks! That's it - it's a work laptop and I didn't want to fiddle it with too much. It's gone in now. 

Thanks again! 

[rbz5416]

Be aware that they can be tricky to remove after they've clicked in.