I know I may be beating a dead horse here as I'm sure its been discussed a lot, but I need some help. I want to install a fuse block to only be keyed hot. Can anyone tell me what relay to use and exactly how to wire the relay. I know the one post under the hood is keyed hot but I want to run my cables from the battery. I am getting a 100 amp fuse block but just not sure how to tie in the relay. Also I will add another battery and another fuse block for constant hot at a later date. Any help would be great!