Wasn't really thinking about the high voltage fast chargers; you can just cut those straight off the super charging station without a car there. I was thinking more along the lines of those little Level 1 CCS chargers that someone would use to charge a parked car on the street overnight.
And aim here is to retrieve the charging cable intact. If you do it right the drill bit shouldn't be getting anywhere close to the energized lines. Just an example, check this data sheet for an EV inlet port: https://www.phoenixcontact.com/us/products/1162148/pdf
The locking mechanism is located to the side. You don't need to remove the locking pin as it's recessed in the charging handle itself, you just need to destroy the mechanism behind the pin so that there's enough void there for you to jostle the pin out and free the connector.
In theory it should actually be quite safe for a thief.