New to wiring acc fuse block

First off I have been reading and subing to threads for months. My first question is why doesnt yamaha build the griz with an acc fuse block? Next is why dont they have guages? I dont understand relays, are they all the same or is amps different? Are they all Bosch? Is the under seat drybox the best place to put fuse block? Thanks

New to wiring acc fuse block

First off I have been reading and subing to threads for months. My first question is why doesnt yamaha build the griz with an acc fuse block? Next is why dont they have guages? I dont understand relays, are they all the same or is amps different? Are they all Bosch? Is the under seat drybox the best place to put fuse block? Thanks