05 1.8 petrol fuel pump pipe missing
 

HI all, could do with some help.
Had the freelander a couple of years now, occasionally get a wiff of fue, especially when passengers in the rear and the tanks is about 1/4 full.
so took up the carpet finally to have a look and i only have one pipe connected to the fuel pump. Obviously this one goes to the engine as its running fine.
where should the other pipe be? is it a vent pipe?
ill try to get a picture , but just wondering if anyone had any ideas
thanks
Mark