Need a little help

So, I am having to replace some of the bulkhead connectors on my 1965 Dart. Have pulled the top and bottom plug from the firewall and am a little confused. Looking at the wiring diagram either numbers or letters for the connectors. Is the plug with the numbers on the top or bottom? Is the numbered plug read left to right with number one (1) closest to the engine? And is the lettered plug read left to right with letter A closest to the engine?

Bulkhead: Engine Compartment:
1 2 3 4 4 3 2 1
5 6 7 8 8 7 6 5

A B C D D B C A
E F G H H G F E