The fuel hose from the banjo on the bottom of the tank goes to that metal pipe in the 2nd pic. Needs jubilee clips too as it is under 3 bar pressure in operation.
The tank also has 2 breather tubes, which just shove onto the 2 nipples on the left side if the bottom of the tank. They both run down there past the front of them relays on the left side of the saddle, (between the air filter box and the chassis), and through the wire loop tidy beside the starter motor, and terminate open ended there.
One has the rollover valve inline in it at beside the relays as per your 1st pic.