Holley Sniper Stealth system

It sounds to me like you are missing some documentation somewhere. What is the actual part number of the complete system you bought.

Here is one version of the support page:

Tech Resources

Fuel pump layout page 11 of this

https://documents.holley.com/techlibrary_199r11031r-1.pdf

Also, I have not been there in awhile, but the Holley support forum is very good. Danny Cabrel is just incredibly patient ant helpful. I don't know WTF Holley is gonna do when he decides to "do something else"

Holley EFI