Recommendations for Wire harness/ Umbilical cords between chassis

Wondering if there is a secure ready made harness available to connect 2 Chassis's (Chassi?) for a power amplifier. One enclosure will house the Electronics and heatshink, the other, the PSU.

I need at least a 3 gang / cable connection (prefer 6) that can be plugged in (screw type preferable)

Is able to handle 20amps sustained, and higher peaks. I have looked at Mouser... but I get lost in the tens of thousands of skus they have...

Any pointers would be appreciated.