IMPORTANT I just figured out how to share designs on TinkerCAD so now you can edit a copy of it yourself at https://www.tinkercad.com/things/1lYgeyISnTO
I got tired of Waiting for D-Brand to release STLs of the attachment point on the back of the Killswitch, and https://www.printables.com/model/387510 didn't fit well (WAY too tight, I shaved off an entire mm from the bottom before it didn't feel like it would break something) so I designed my own. this doesn't really do anything on it's own, but is meant to be used to either glue to things, or be remixed into other models, or stuff like that.
I suggest printing it face down like it is, with supports touching build plate
I also included one with a small notch at the top for help with alignment
The author marked this model as their own original creation.