1UP Racing bullet connector grips

These battery terminal ‘grips’ take advantage of the M3 thread used in the 1UP Racing 5mm bullet connectors. So they are held by an 8mm M3 flat head screw and make it much easier to remove/install the bullet connector into a shorty pack, and even encourage correct orientation/polarity of the battery connection. The single terminal grip is meant for the negative terminal in a 4WD buggy like the TLR 22x4, where there isn't clearance with the body for both terminals:

Aside from improving ergonomics, the negative connector definitely ‘feels’ much different than the positive, and so it makes it less likely to connect reverse-polarity.

The other version of the grip connects both the negative and positive terminals together where there is plenty of clearance with the body, such as a short course truck. The spacing of the terminals is 38mm on center, to fit the Protek battery spacing. The orientation of the connectors being ‘locked in’ also practically prevents reverse polarity connection to the ESC.

The grips feel very secure in part due to the ‘cone’ feature that mates with the ‘countersunk’ feature in the 1UP Racing aluminum pieces. So when the 8mm M3 screw is tightened down, there's a good contact surface area between the 3D-printed piece and the connector. The piece was designed to expose about 1mm of threads, so the only thing you'll have to do possibly is tighten down the set screw in the bullet connector further to allow the 8mm screw to be fully tightened.

I used Hatchbox PETG for these and printed directly on the build plate ‘upside-down’ as shown in the above picture. No supports were needed. I also used 100% infill to keep the stiffness up. Enjoy!