This is a walk through of a DIY install I did for a level 2 EV charger.
Links (affiliate where possible):
Emporia Level 2 Hard Wired Charger: https://amzn.to/3L8F5I3
The good drywall anchors: https://amzn.to/3zmCTdg
Large Wire Nuts: https://www.homedepot.com/p/IDEAL-454-
Blue-Wing-Nut-Wire-Connectors-25-Pack-30-454P/202894280