These are high-current (30-50A range) connectors though (for the wheelchair traction batteries). Getting the positioning correct so that the spring tension in t

These are high-current (30-50A range) connectors though (for the wheelchair traction batteries). Getting the positioning correct so that the spring tension in the metal terminals creates a reliable/low-resistance/non-sparking connection is a shared contribution from the geometry of the metal terminal and the plastic housing (as opposed to most low current (0-5 Amp) electrical connections, where the connection geometry is most commonly provided by the metal geometry alone and the plastic's contribution is just keeping them "organized and close enough to mate"). Like this: https://upload.wikimedia.org/wikipedia/commons/6/63/Powerpole_cutaway.jpg https://upload.wikimedia.org/wikipedia/commons/6/63/Powerpol...