Power supply assembly issue

Hi guys!
Just been building my Ormerod 2 this week. Looking forward to getting it up and running but I have noticed a problem with my power supply housing.
It is one of the PSUs with the internal fan.
On the assembly instructions image it shows that there is a screw hole near the top at the back for the Duet housing to slide into -

However on the one I have the hole appears to be at the bottom ( Drop box link: [www.dropbox.com] )

Has anyone come accross this before? Have I got the wrong power supply or is this a variation in the kit that hasn't been documented yet? I've already had a variation in the hot-end housing as I was supplied an acrylic spacer as opposed to the two 3D printed ducting bits.

Thanks for any help guys!

I need this thread closed. I was a bit of a fool and didn't look under the yellow sticker for the second hole. I do appologise.

Don't worry - I also had a moment of idiocy with this one and mine wasn't even under the sticker :-)

I've been a bit quick to panic on this thing instead of taking time to poke around. I am really worried I might mess up something espensive. Plus I am really eager to get to printing!