Which fitting is the pressure to carb and the supply from tank ?

The original fuel pumps were the same on both the US and European 3 cylinder gasoline thousand series tractors. The fuel pump in your picture is definitely different from the original design. I'm guessing it's a third party aftermarket pump.

The fitting that has the opening angling upward should be connected to the line going to the sediment bowl and then onward to the carb. The line coming from the fuel tank should be routed so that it goes across the engine down lower and comes up to the other fitting on the pump from below. That routing should be the same no matter if its a US or European built tractor.
Engine serial number should be on the right side. Only very early European engines had them on the left side.

Not sure what you mean by "the filter in power steering cannister.engine is all english and seals too". The US and European power steering pumps were identical. There were two different designs used at two different times, and the switchover from one design to the other was at different times for different models, and on a couple of models the timing of the switchover was different depending on the factory. The earlier design used in all models had the reservoir separate from the body of the pump, with most of them having the reservoir up above the pump body, except for the 4500 which used the main loader & backhoe reservoir up in the nose of the tractor above the radiator. The later design used at all factories on all models had the reservoir integrated around the body of the pump itself.
The mounting holes on the starter flange should be a snug fit on the bolts. If your starter has mounting holes that are too large then it is likely not the correct starter.

Your pump is a different model than I'm used to.
The one below is the type I'm used to seeing. The left hand fitting goes to the carb. I suspect yours is the same but can not say that with authority.

well ultradog..Im not surprised as everything on this tractor seems to not be right ..every part I have taken off it has a english part #.. serial number says made in US but I dont believe it ..I think the motor has been replaced at some time...Even the bearing for the input shaft from tranny...the filter in power steering cannister.engine is all english and seals too..serial number is on the right side above oil pan not on the left side..I really dont see my steel lines in the diagram on the online parts catolog...another thing..it has a newer starter on it and has 3 bolts... maybe Im wrong but I have never had bolts for a starter that the bolts are smaller in the starter flange ..the bolts should should fit thru the starter flange without being sloppy..so I thought maybe someone put smaller bolts in or the original bolts were special and had a larger shoulder on them to make it fit snug but parts book does not show such a bolt...it calls for a..... Hex, 3/8"-16 x 1 1/4", G5, Full Thread...if thats the case ..I would have designed it with a larger shoulder to fit the starter flange so as it wasn;t being held tight by how much torque you put on them...its a 4 1/2 starter I even thought of sliding a short sleeve over the bolt to make up the difference...