Power steering pipe o rings

[Wigiz]

Hi, I've got a leak on the high pressure power steering to rack pipe, ordered 2 new o rings for the pipes so will replace both at the same time, thing is they are both different sizes one is bigger than the other, it's been bodged before and that's why it's still leaking so when I remove both pipes don't know what I'm going to encounter, is it the larger of the rings for the high pressure pipe and smaller for the return or is it visa versa,thanks in advance wigiz.

[Wigiz]

These are the o rings

[davyjcb]

Small pressure, large return

[Wigiz]

Thanks davy