Rear Mounting Driver Tips?

Good day everyone, hope y’all are well

What are your guys’ best practices or suggestions for rear mounting drivers to a baffle?


I’m specifically having a bit of a hard time trying to read mount an SB17NBAC to the rear of my baffle, as I’ve noticed the driver frame has a bit of a curved lip to it (as opposed to being a totally flat frame) - would anybody have any tips for this scenario?


Thank you guys in advance
 
Hopefully the photos attached help illustrate what I’m saying - not too certain whether or not it’s a beauty ring, but I’ll give it a shot?

I’ve tried using nut inserts to mount them from the rear as well, but the frame lip I mentioned above seems to be giving me a little bit of a headache so far - hence this thread
 

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