drain pump electric wires/connection?

In Samsung front loader washer model WD j1255c,iopened the drain filter and had to push it from behind as the cap did not pull out filter.For that I also had to unplug the drain pump but for got to remember which electric wire is to go in which pin of pump.There are 2 wires ,one grey colour and other white colour if someone could help by guiding which wire should go where least I end up exploding the pump.There are 2 pins ,one vertical and other horizontal or on pump one side is market with letter "N" and other side "L" if that could be any assistance.Any help is much appreciated