Turn signals not working, blowing fuse

I am dutifully following the wiring diagrams as advised.

When I see CE 2(B) and CE 2(A), the bulkhead connector, which one is B and which one is A?
Go to the end of the section and there is are illustrations of all of the connectors.

Looks like its page 164

Use the bumpouts on the connectors to confirm orientation of the drawing compared to what you see on the car. I suspect the artist didn't know how it will be oriented in the car.
upload_2022-1-12_17-40-57.png

Also they usually only provide an engine side or a passenger compartment view. It was up to the tech to reverse it when needed.

CE = Connectors in Engine bay
B1 probably means Backup 1 18 BK is 18 gage Black, a fairly small wire.