Cheap reliable connectors

[Voicecoil]

What sort of current /voltage rating will you need for the servos? That may determine your choice to some extent. BTW, there is (or certainly was a few years back) one of Molex type connectors which does come with an option of a sort of chassis mounting bracket - but it was hardly what you'd call an industrial connector, more aimed at supporting something going through an internal bulkhead IMHO. Unfortunately the words GOOD, CHEAP and RELIABLE don't often sit side by side in the connector world. If the current and voltage limits and a plastic shell are OK, check out the Bulgin Buccaneer range, probably the 400 series - good for the money. Alternatively you could go for a couple of big multiways.

Also it may be worth thinking about what sort of cabling you need to use before deciding the connector, just to make sure they'll fit.... I know very little about industrial servo drives, but it may be that there's a certain amount (or even quite a lot) of noise/interference on the motor outputs, which would mean you'd want to use a screened cable for those to stop them interfering with everything else. And if that's the case you certainly wouldn't be wanting to run the motor wires down the same cable as the encoder wires.