Lets see a picture of the terminal you just installed.The battery reads 12.6 with a multimeter,
Any suggestions on any particular fuses I should check first before I replace the starter.
Can you confirm dash board/ lights / etc. all work?
Then you turn the key and nothing happens?
I don't have much experience with the starter circuit but I would think if you have a multimeter you could probably probe around at the starter relay or something to confirm it's getting power before diving into a starter replacement