Where is my power?
Without knowing more about how you wired the battery relocation AND the car wiring (factory, aftermarket, etc) we are just guessing
You must have a connection from the battery to the starter relay battery stud
If using factory wiring, the power goes from the start relay stud, through the fuse link, through the bulkhead and to and through the ammeter
If you have the dash out of the car, you must have the ammeter terminals jumpered together.
If you are going to race, you need a disconnect which further complicates wiring, because you must make a way of disconnecting the alternator/ alternator field or the ignition, otherwise the alternator will cause run--on