hahah new used car fun. Please help identifying relay and plugs

I have been slowly tearing into this car and while searching for my turn signal flasher, I noticed there are several plugs that do not have anything attached to them. These are just a few, but I will take it a step at a time :P. Can anyone please help in identifying them? The car is a 1970 Dart.

This one is just behind and to the left of the radio:


And these two were in front of the heater box on the passenger's side under the dash


This relay was in the glove box and looks like it goes on the end of the black plug in the above picture, but what does it do? A part number search didn't help me.


All of this and still no turn signal flasher! Where is it usually mounted in these cars? I found the hazard flasher, and it works fine, but nothing for the turn signals.

Thanks in advance!