"I bought 2 of these to install 2 ovens. The internal connectors unscrew from the back box in a frame making it very easy to connect the wires. It easily took 2 6mm wires in the same hole, which is what I needed.
Just make sure you buy the matching MK pattress box, as the screws are slightly off centre and will not fit with other boxes as I found out!
I've given 5 stars for performance and reliability, but time will tell."