Thanks for the compliment, post a picture.
The back of the AC pedals have a slot in between to raised sides with bolt holes through both. The pedal mount ground flat to meet the back of the AC pedal fits in the slot and a bolt sleeves through to holes to secure the pedal to the mount.
I would not grind off the raised aluminum behind the AC pedal as this is the only way to run the bolt through to secure the pedal to the mount.
The end of the mount with pedal removed should have 5/16 hole through it.
Boy I had a hard time writing an explanation for a simple thing
Lou