Which ways is it ok mount it in, can't find the manual.

If we new what it was maybe we could say.

The fuel pump

Can you get the instructions by clicking the big yellow button that says view and print installation instructions? Based on experience with automotive electric pumps (and this looks like one) I'd mount it where the motor is on top and the pumping parts are at the bottom.

No they no longer have the manual up[]

You would think it would be mounted so that the label is readable?

Readable anyway you look at it, i mounted it lines down, so if it blows up they'll have to redesign it with an arrow pointing the right way.

It might not matter for this pump but this is how I'd mount it

I think as a matter of safety the electrical lines should be on top.