This component compliments the zStop top screw holder ( http://www.thingiverse.com/thing:114789) produced by john Biehler
The two together provide a complete solution for adding a zStop to your Printrbot Simple, This is for the production V2 bot, not the beta.
to wire the switch, connect the normally connected (nc) terminals of the micro switch (normally the two outer connections) to pins 1 and 3 of the relevant zStop connector on the Printrboard.
Printed on the Printrbot Simple with Black PLA, sliced on Slic3r with no support material in place. IT is not needed for this part.