Hey GregZo,
yes, the Elite stepper motors with integrated stepper drivers and the Elite power supply unit have other connector dimensions, but they use the same Molex/Amphenol tin-plated crimp terminals.
Crimping your own Molex/Amphenol connectors to make your own Onefinity custom cables is possible, but requires owning the exact matching crimping pliers (or crimping die insert), and of course the exact matching wire gauge according to datasheet, otherwise the electrical connection will not be safe. I described what you need to make your own Onefinity cables here and here. But I believe many people solder them (and and incur the disadvantages).