Rack Mount Kit for Sophos XGS 126

Are you sure, this is a XGS125 RMK?

https://docs.sophos.com/nsg/hardware/mountingInstructions/sophos-rackmount-kit-mounting-instructions-xgs-116-116w-126-126w-136-136w_2020-12-16.pdf

In the original packet there are 4 Rackmount-Plates. You need two of them. Which ones depend on mounting direction. Back to front or front to front. You have a closer look into instructions and probably try the other two parts! It will be correctly aligned, once figured out!

Ok, going over this again.  I was doing this onsite, in a tight space and that was one issue I had.  The mounting preference due to the way it was being mounted would be in diagram 2b of the instructions.  It was a vertical mount, and I wanted the ports to be facing up to be easily accessible.  So for me, that would have been the "front" however, I am guessing I am incorrect there.  Therefore I put the "small bracket", which now I see is marked as "right", on the side I felt was the "right side".  Are you saying that small bracket should be on the other side, and the large wide mounting bracket with the adapter tray be on the other?

the ports are on the back