Which pipes go in which hole on the rear brake regulator a 97 renault megane 1.6 cab?

The rear brake regulator on a 97 Renault Megane 1.6 cab receives three pipes: one from the master cylinder, one to the rear left wheel and one to the rear right wheel.

The pipe from the master cylinder goes into the port marked with either an "M" or a "1".

The pipe to the rear left wheel goes into the port marked with either an "L" or "2".

The pipe to the rear right wheel goes into the port marked either an "R" or "3".