So I pulled out the wire from the relay where power would have come from the Miata harness to the fuel pump and hooked the power out wire from my fuel relay on my gm fuel relay. I had my gm harness reworked by Lsx specialties and he put a dedicated fuel relay for this purpose. I just didn’t have to run the wire all the way back to the fuel pump I used what Mazda had already ran for me. You can also use the ground signal from the gm harness from the pcm to ground the Miata relay instead.