Why do the mounting studs on the 379L not line up with the back of the 55 rim?

The existing 373L control was modified and re-named as 379L to allow us to use the 55 rim device on an ADA door opening.  The 379L control is our 373L with different hex studs to accept the 55 rim 12-24 mounting screws.

See related solution below. 


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