ARB10900027 12/24V DC Wiring Kit For Refrigerator

I use the arb wire cable kit to my battery i want to know do i have to turn off my freezer fridge every time i turn my vehicle? is it bad for freezer

Will this fit an Engel 43 qt fridge?

Can I turn on and turn off fridge from this display?

What is the code for the matching plug for this socket? The one shipped with the fridge does not fit.