The file 'Rivian MagSafe Charging Plate And Bracket 3D Printer Model' is (stl) file type, size is 524.2KB.
This is a bracket that will bolt onto the stock baseplate and allow you to have a MagSafe charger that uses the powersupply for the stock charger and doesn't tie up your USB.
I used the power adapter from s00nish
I bought 2 MagSafe Adapters from amazon