fuel tank suction line

So in hopes of seeing inside my gas tank I purchased a small borescope that will work on my cell phone. Its a cheap part with 6 lcd lights in the end of it. So I hopefully can see what and where my suction is attached to the tank. It appears to be soldered to the drain bung area but why. I see no need for this attachment. When I get the borescope I will figure out the pic postings method here and show what the tank looks like inside and out.

well I failed with posting pics of mt tank. I have no idea how to post posts.

How does the gas tank suction line come out of the tank. Mine feels like it is attached to something in the tank.