i have used this kind of set up before and always had good results, using a fuse block from an VP commodore i picked up from U-Pullit the local pic a part. i knocked up a little bracket to pick up a captive nut used by the washer bottle & using the original fuse block mount. next will be brackets for relays and final wiring for accessories.
the fuse block has a main feed which is fused @ 60amp then there are 4 outputs that can be fused from 10amp up to 40amp and a spot for a spare fuse
space
fuse block
bracketomerty
mounted
dummied it up with relays i had to see how it will all sit together.
rear of fuse block
relays and looms
switches
i've been running this set up for the last 3years & it's never failed