Makita 18V Battery Holder Receptacle Socket for DIY stuff or TS100
You can find the middle 18V connector part on amazon or aliexpress.
https://www.aliexpress.com/item/4000977665176.html
Edit as you need in Onshape
https://cad.onshape.com/documents/a62b52dd01e0ab4bb20cebe0/w/be7d92a55989c1143ceac5c2/e/23f59605fddc0fbff0e33a61
Makita_Battery_Mount_-_Deckel_mit_Kabelausgang.stl | 2.6MB | |
Makita_Battery_Mount_-_Mount.stl | 1.9MB | |
Makita_Battery_Mount_-_Mount_with_Switch.stl | 2.9MB |