The Hillman Group 58179 2-1/2-Inch Hole Nylon Knock Out Seal, Black, 2-Pack

All the above, and you don't need to remove the frunk. Only remove the top and driver side panels. You need a 18mm deep socket to loosen the strut. Also see the forum for directions on adding two 2.5" access holes for the +12V and GND/HV shutoff. These caps work great https://www.amazon.com/dp/B00MN6GQIY