Help Needed - Gas Gauge

[BADSAM]

First, I hope this is a stupid question that is easily answered.

Background: When I got this 1969 Suburban it had no tank.

I got ahold of a blazer tank and installed it, when I did there was no sign of a wire for the gas gage. I pulled a wire from a pickup and hooked it up to the tank and then just ran the wire along the frame rail. Ofcourse it was too short, so it's just been zip tied there waiting for me to do something with it for awhile.

This week I felt kinda giddy and thought I would go ahead and hook it up. I spliced some wire to it and crawled under the dash to plug it in.

To my surprise there was no male connector in the fuse block. Just an empty hole that said gas gauge. I looked around under the dash for a wire or connector that it might hook up to and found nothing. I even pulled the front part of the fuse block from the firewall to look behind it thinking it might have broken and the wire was back there. Still nothing.

I crawled under the back of the sub looking for any hints of the old wire, still nothing.

Any help to solve my mystery would be appreciated. Is there anywayto go staright to the gauge?

Thanks