wire size, battery terminals, and fuse rateing

[Clownrock95]

i think i have this figured out but i wana double check with some people that know what they are doing

i have 1 amp that has a recommended fuse size of 150 and another that has 3 25 amp fuses built in so im planing to use a 250 amp fuse (correct?)

i am going to be running ~20ft of shca 1/0 ofc on said fuse (safe?)

will these work with standard chevy (trailblazer) side post attachments with a d3400

thanks in advance i just want to make sure my plan is solid before i start buying the expensive stuff

[reedal]

Yes, 250A fuse will be fine for that in my opinion (amps and power wire)

Yes, those adapters will work, it's what I have for my D3400 in my Tahoe