This is a LiPo balance plug connector jack for RC UAS/UAV and ground vehicles. The OpenSCAD file is customizable to make balance connectors for any size battery pack from 2S and up. Simply change the S variable in the beginning of the script to define the battery pack's cell count. I have included .stl files for 3S through 6S connector jacks.
I ran with a .1mm layer height for the test connector that is in the pics.
I had purchased a camera gimbal for my hexacopter drone and was in need of a way to connect it to my 4S battery to the gimbal. I decided that I would use the balance charge plug since it didn't have a super high current draw like the motors do. I needed a connector for it, but I didn't have one. I designed and printed the connector and then pulled 2 pins from a 2.54mm pitch header connector that I had in my parts box to use to connect the gimbal power cable. I have pictures of the adapter that I made. I tested it and it works well.
I hope this is useful to some.