How do I properly reassemble the switch housing after adjusting the receiver jumpers?

First insert the plug from the upper housing into the plug receptacle in the receiver module, noting that the plug is polarized and will only connect one way. Then line up the lower switch housing with the upper housing and assemble with the 3 screws and lockwashers provided. Make sure the screws are snug, as loose screws could cause the assembly to separate during operation. (Page 1)