Since i am completely clueless when it comes to wiring, all i can find in a slo-blow fuse is the round type, I have 10ga wire that i am running to a 6 circuit blu sea box. I was told to be sure to install a 3 amp fuse (i think this is right) on each head unit wire. I have the type that use the blade type of fuses. I have 3 amp fuses but i dont see that they are slo blow? are these ok.. The helix 7 say 3 amp the 12 says 5 amp in the installation.
Also do i need a circuit breaker between the battery and the 6 circuit box?

thanks