For practically the same money, you might want to look at 6353EL-B inlet and 6364CRN cordset female connector plug. The inlet has an additional cover strain relief threads to take it off the connectors.
I plan on going in from the bottom, so strain relief should be not necessary...
I think I have it covered, ***Bernie approved***, and hopefully less than $200 for all.
These inlets for the underside of the control box were bought for $75 shipped for two (can clean up the other for 2nd box, or sell)

I hope to get this for less than $100.. 6ga

and these are $8 each on Amazon, will get two, one for each brewing location. (will be mounted very close to main Panel, and with 6ga wire in conduit..)

Now we're cooking with electrons!