02civic

iTrader: (3)

ok so i'm trying to install my tach.....its an autometer 5" if that matters. i read the diy but i am a tech idiot and know nothing unless very very dumbed down and with pictures. my question is i know what wires connect to what but i dunno where and how. i found the blue one beside the battery but how do i connect it? and the 3rd fuse that is mentioned is that the 3rd fuse in the dash fuse box or the engine? please somebody break this down into fool language i really need to get this thing in asap. i'd appreciate the help. thanx