1980 911 fuel pump

[rtg37]

I have a 1980 911 sc that the fuel pump relay and pig tail burned up on. I fig easy enough lmao. I put the new pig tell in and relay. Now the prob is there is no power on the pig tail and not powering the fuel pump. I fig the fuel pump went to ground and burnt it up but now i think its got to be something else. What i dont know is where the power comes from to feed the pig tail. I have looked ever were to find wireing but no luck so far. Please let me know what u think. Thank you and dont worrie talk to like i dont know any thing bc i dont when it comes to this.