any idea how to clean/organize this area better. looks like a mess

 

That should be on the drivers side fender, not the firewall.

EDIT....

Like this:

 

Tape the wires nicely.

 

What year car? Some later ones had the relay/j-block on the firewall as this one appears to be.

 

'70-'71 on fender, '72 on firewall. Most if not all of those wires should be there. The one with butt connectors is slightly suspect. You need a wiring diagram for your year of car. A factory service manual is invaluable for things like this, check ebay?

 

"Some inline fuse" is the fuse for the high speed blower...20 amp?