questions about battery disconnect wiring

I think I have everything except the cut off. What rating do I need? I accidentally ordered a 2 post Moroso. 175 amp continuous, 1000 amp surge. That has to go back.
I see a Moroso 4 post 74108 https://www.amazon.com/dp/B01GWD2XUS/?tag=fabo03-20 I can’t find specs on it, but all four posts are 3/8.
And a Taylor 1033. 100 amp continuous, no surge rating.
Taylor Cable 1033 Taylor 4-Post Battery Disconnect Switches | Summit Racing Rather cheap. Too cheap?
I must be missing something in searching these.