Looks fine! Does the missing arm hit the dial? Or just off for photo clarity?
If you want to plug the old hole, could you file the edges square enough to accept a carriage bolt? I've seen black-coated ones in Blowe's & Schlomo Depot that would look pretty good (better than zinc or galv).
No, it clears. I just left it off so I have more room to turn dial. This safe is in my shop so it won't be holding valuables overnight. I'm using it mainly for the gun stuff I leave down here. Some ammo, cleaning stuff, gun parts, etc.