>>510977170
>>510976776
>>510958700

Oh and obviously this too
So I designed this item. Shocker can be taken out for recharge when it is opened. There are also attachment points in the front and in the back of the collar, do combine it with other cool contraptions.

Model is available here: https://www.printables.com/model/882688-shock-collar-adapter
https://www.reddit.com/r/BdsmDIY/comments/1cu73r6/3d_printed_collar_with_slot_for_dog_training/

3D printable