Master Cylinder connections, which way around?

Probably should have made note of this before I cut all me manky old pipes off.

It's an '87 90, just two outlet ports on master cylinder, one normal M10x1 and other looks to be M12x1, it's okay, kept the union and she's mint, trouble is which is for fronts and which is for rears

Cheers

Front port to front brakes.

Thank you Flossie, to confirm do you mean port closest to front of vehicle

Yes.

Cheers Flossie, muchly appreciated