Installing gpu block

[Captain]

Hi, I'm trying to install the xspc block on my card, I have noticed one hole is smaller than the rest causing me to not fit it properly, this common or am I being a Noob?

Sorry if the image is big, only got my phone! It's the hole closest to the port fittings.

Thanks for any help

 

[Captain]

Yep definitely faulty, just checked the other block and it's fine

 

[Captain]

I haven't tried putting a fitting in that part mate, that's how it's come