I recently converted my EZGO TXT golf cart to lithium batteries and no longer needed to use the old charging receptacle. After removing the old receptacle (note to anybody attempting this, use a drill to drill out the rivets), I designed this basic cover to bolt into and cover the old charging port. I think the hole positions are standard across vehicles, so hopefully this can be used by others. The 3MF has 40% infill because I am going to mount a 3 prong AC port extension plug, but you can print at 10% infill if you are just going to cover the gap.

Use M5 bolts to attach this.