the long vertical line is the firewall, (1) is the starter relay, (2) & (3) are the black bulkhead halves, (4) is Nacho's bypass. (5) runs up to the stock ammeter in the dash but to add a different ammeter you would cut the line and run the two cut ends (5) & (6) to your new ammeter (7), Downstream from the ammeter goes to a T just like OE then it splits off and powers the headlight switch (8)(which is hot all the time), another split to the ign sw (9) which is hot all the time and splits again to the fuse block (stock or Painless)(10)(which is hot all the time) which protects everything downstream from it such as brake lights hazard flashers, horn, radio, dome light, accessories