Hey guys I’m almost ready to swap in my new engine but there a relay missing from when we tried to rebuild it, the mechanic that took it out has passed away also

Are they all the same? Or is it a specific relay for that missing spot?

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I believe it’s the fuel pump relay I’m not a mechanic so does anyone know which relay I should specifically order? Looked everywhere for this damn yellow thing. I’ll add pictures the manual doesn’t give me much info

any help is greatly appreciated!