Fuel Pump Relay Pin #30-#87

[MBZ86]

I have learned how to jump the fuel pump relay pin #30 and #87 (thanks to the forum).

I am using a 12 gauge solid copper wire as a jumper. Is there any certain size I should use or is that one ok? Can I blow or burn anything up if I leave that jumper in the relay for an extended period of time? Would I have time to check if the fuel pumps are getting 12 volts at the pump as Arthur Dalton suggested to another poster?

I don't have anyone who can help me so can this be a one person job?

Thanks to anyone who can help!