Thanks to Simhopp : https://www.thingiverse.com/thing:1815758.
I printed the Bosch Pro 18v battery socket with my RepRap Emotion µDelta.
Printing parameters : 95% infill at 50mm/s, 0.2mm layer height and support.
Then make the electrical connection :
The pads are made from a flattened copper plumbing tube with a thickness of 2mm. It will most certainly corrode so remember to later use electrical grease on the pads.
Cut a piece that will fit tightly in the gap then mark the piece with the line you need to cut :
Cut following the lines (hacksaw would also work) :
Install them in the groove :
Test the voltage between connectors with a voltmeter :
Bend the tabs flush :
Electrical connectors are in place, socket is ready for soldering.