Do I need to splice into my fuel guage wire ?

[GOPAPA]

I have installed a rear tank with the sending unit in it and all grouded and a wire running through the firewall to under the dash .

I have a harness that carries the wires form the fuel guage to the fuse block . Not sure what wire is the fuel guage wire.

I see there is a fuel guage plugin the fuse block but not sure what it is for .



My question is this: What do I need to do to complete the hook up .

thx as always if you can get me going on this ..