Need some electrical help with my ‘68 Plymouth Valiant 100

Dana67Dart said
The red arrow points to the actual fusible link.
View attachment 1716332137

This is what it looks like not attached to anything. (NOTE: there is a tab on the wire that says FUSABLE LINK) in your case the wire looks black and the tab looks yellow.

You need to understand that the entire wire is a fuse. the TAB is only there as an indicator.
View attachment 1716332136

I know it has been mentioned before but terminology means a lot.

This is The "Bulkhead" all the wires inside the car connect to it under the dash
View attachment 1716332142

These are the Bulkhead Connectors. all the wires in the engine compartment and the forward lighting are connected to them. They connect to the bulk head.

View attachment 1716332143

There are NO fuses in the Bulkhead EXCEPT the Fusable Link which is attached to it.

This is the "Fuse Block" it is mounted under the dash by the Emergency brake. SOME fuses are powered some are only powered when something is on

View attachment 1716332145

Also, how do I test these fuses? I’m assuming I pull them out one by one, but how do you suggest actually making sure they work (besides if they are broken)?

With the bulkhead under the dash, would I just pull out the bulkhead connectors and use the contact cleaner and diaelectric grease on those? I did this to the ones right on the firewall that I took a picture of, but not these ones under the dash.