ahhh, a terminal strip with fuses, or what most would call a fuse box
like this, or maybe with circuit breakers or modern style fuses rather than glass fuses - and a relay is
like this, used mostly in the headlight or horn circuit where you want to avoid having the high current draw in the switch
wiring that fuse/terminal switch in is just like using
inline fuses, power from the battery to one side of the fuse, other side to the item being powered - some terminal strips have a single post for the battery side to hook to, if each fuse has individual terminals, you can run the power to a common wire across one side of the strip to catch each fuse position so each one is "tapping off" the same power connection - make sure you use a fairly heavy wire in that case
Bill