I've got a 1955 series 2 split screen 4 door saloon fitted with a 1098 cc engine and i'm loving it

I've just removed the petrol tank sender unit because the sealing gasket has stopped sealing ! I'm going to fit a new sender and seal as soon as they come but without thinking i didn't make a note of which way round the sender went, ie, from standing at the back of the car which way should the float arm go off to inside the tank and which way the connector for the wire points ? I think the wire may of pointed towards the front of the car but i'm sure i read somewhere the float should be in the humped part of the tank.
Be very grateful if someone knows for sure as i don't really want to have to remove it over and over again !
Many Thanks in advance and i'll be starting a restroration thread very soon

Brett.