LED fog light upgrade question

Good morning everybody.
I recently purchased a pair of raxial axiom led fog lights, and I'm running into an issue.
I took my old, yellowed out original fog lights, and can't install the new ones.
There is the square hole for the white threaded grommet to be able to adjust the fog light. The issue is, I can't seem to get the original grommet from my old lights to fit in the new lights. The new ones do not come with grommets, and even local auto parts stores don't have anything that will fit.
The black grommets included do not fit into the space at all.
Of course, there are no instructions.
Thanks in advance

 

Sadly, it's time to contact the seller / manufacturer.