i looked at the wiring diagram and it shows goes from the alt to connector x-07 which is the yellow plug on the other side of the engine bay just where the wwiring goes in the firewall then 1 branches to the choke and check relay which branches off 1 more time b4 it gets to the relay, one goes to a fuse which in one dicretion goes to anther fuse for the kick down switch which i belive is for a A/T, in the other direction it goes to the ignition switch. thats all it shows you can go to
http://foxed.ca/foxed/index.php?page=rx7manual#firstgen and D/L the manual to your pc you going to be looking for page 50-10 or pdf pg 10