[Croozer]

Unfortunately without seeing the set it is not possible for me to say whether it should be the top or bottom pin which should be connected to neutral.

It will be necessary for you to trace the wiring to find out which pole ends up on the chassis, bearing in mind that it is connected via a resistor.

This point is most important, if you get it wrong you will end up with the whole lump of metal in front of you being mains live -
with serious danger if it should be touched by someone, especially if they are earthed.

Please be sure of this point before reconnecting to the supply.