You can get suitable connectors for the U 67 from Binder connectors in their Series 691, also known as M25 connectors. Chedk out this link:
http://www.binder-connector.de/en/produc ts
The male cable plug is 09-0041 00 07, the corresponding cable female is 09-0042 00 07, and the matching panel mounts are 09-0043 00 07 (male) and 09-0044 00 07 (female) respectively.
You will need to slightly modify either of these parts by filing a key notch adjacent to pin 1. By default the notch is located 30 degrees off between pins 6 and 1.