This is the Laborem plugs database. All the designed schematics are available for everyone.
The hardware developpement is one part of the Laborem project: a open source solution for teaching industrial engineering.
The concept and work have been published in several scientific conferences. One example is online :
ICERI 2018 : https://www.iutbayonne.univ-pau.fr/~luthon/iceri2018.pdf
Generic plug outline and dimensions are detailled in two files.