I just finished installing a 14-50 outlet in my garage. I haven't hooked it up to the breaker box yet. I used 6/3 nm-b cable with ground. I made the wire and ground connections to the outlet but I didn't connect the ground wire to the metal box and now I get the feeling that's wrong. Is it? I didn't see a screw on the metal box to clue me in. Should I connect the ground to the metal box?
Here is a picture of the outlet and links to what's behind the plate.
Wall plate: https://www.homedepot.com/p/Legrand-Pass-Seymour-2-Gang-1-Power-Outlet-Wall-Plate-Stainless-Steel-SL703CC12/202313808?keyword=785007180268&semanticToken=20030000+++%3E++++st%3A%7B785007180268%7D%3Ast++cn%3A%7B0%3A0%7D++cn%3A%7B0%3A0%7D++785007180268+%7Bproductkey%7D+qu%3A%7B785007180268%7D
Cable clamp: https://www.homedepot.com/p/Halex-3-8-in-Non-Metallic-NM-Twin-Screw-Cable-Clamp-Connectors-5-Pack-20511/100133208?keyword=051411205119&semanticToken=20030000+++%3E++++st%3A%7B051411205119%7D%3Ast++cn%3A%7B0%3A0%7D++cn%3A%7B0%3A0%7D++51411205119+%7Bproductkey%7D+qu%3A%7B51411205119%7D