First off, I've not ever laid eyes on one of them smokers.
That said
Forget the Bad idea of "glue"
Make up a flat plate using the existing bolts in the area or replacing the bolts with studs to allow mounting a plate that you can now mount your linkages.
If you use 1/4" aluminum you can drill/tap it for the bracket. or use metal if you have to do any welding for something.
If me, I'd pick the easiest.
in the long run the cover swap might prove the best option.
Understand, I don't know your shop equipment availability or your lever of craftsmanship.
As I age I have learned to consider time spent reinventing the wheel so to speak.
Do the cover swap and never think of it again.
Just my opinion and you did ask Ha,LOL.
