How to add fuel pump for dual webers

One of the last steps in my dual weber project is finding out how to wire in the fuel pump.
The previous engine had a mechanical fuel pump so I don't have any old fuelpump wires I can repurpose.

I've got a big white/pink wire that used to go to the manifold heater. I've read that I can use this circuit for the fuel pump too.
So if that is correct, what is the best course of action?

Should I mount a fuelpump against the firewall so I can use the pink/white wire?
Something like a Facet fuelpump.

OR should I place one closer to the fuel tank and pull a new wire?

Hope to hear, thanks in advance!