Fusible link , MRBF fuse sizing on terminal block (1 Viewer)

[3PinFever]

I'm working on replacing the fusible links with a Blue Sea terminal block and want to appropriately size the MRBF fuse. For the large 3 green wire fusible link , each is a 40amp wire. In parallel not sure if it should be additive or just a certain percentage over the assumed draw? Thanks to those more electrically inclined.

 

[OSS]

A 40A fuse can replace each fusible linked circuit. If there's three circuits, use three 40A fuses. DONT wire them all together in one termination and use a 120A breaker.