Did it work? As I said, the ports on the router look a little weird, but if a normal network cable plugged into them then you’re good.

As others have said, you weren’t being dense at all. Your question wasn’t stupid, just a little misguided, and it was very quick for us to figure it out with just a little bit of back and forth. I wish all tech support was this efficient!

BTW, if anything I was being a bit rude when I said I wasn’t sure why you thought the other end needed to be different. Apologies for that. Looking at the photo of the router you sent around the same time, I can see why you thought that, it really does look different.