Double Pumper Wiring, Tank Forward

[mtocrs1]

Bought a used Reds Double pumper off another board member. When it showed up the main pump feed harness was jacked and the secondary harness with hopps switch was not included
Anyway I plan to use my KB Boost a pump to run the primary pump. How is the secondary pump supposed to be wired from the tank forward? Is it normally fed from the lug on the back of the alternator and then through the hobbs switch to secondary pump? Normally gounded to the fuel tank or.....?

 

[BEATAV8]

racetronix sells a wiring harness and hobbs switch for double pumpers

 

[mtocrs1]

Thanks for the info however I really dont think I need a complete harness. I only need to feed the secondary pump. I was thinking this is something I could put together. Feed from alternator thru relay activated by hobbs switch? Any reason why this wouldnt work?

 

[Racetronix]

Racetronix - G7 Double Pump Kit - Kit Configuration Page