Fusible link or not?

JMO,

Get a Maxi fuse holder and fuse the line for that fuse panel in total, then have each sub-system fused for their requirements. That way the overall is protected and each subsystem is as well. I wouldn't use a fusible link on that item.

I have some maxi holders/fuses here that are 6Ga wire IIRC. If you have an idea regarding draw from the components, sizing it is not tough.