My Maytag stack laundry LSE7806ACE unit - dryer sensor plate shook loose (unscrewed) and the blue wire is hanging inside the drum. It needs to be reattached to the plate and screwed in, but I cannot tell how to attach it. It has the metal wire ends on it, but I can't see where it goes onto the plate. The plate has two corresponding metal pins on one end, but they don't align. Guidance appreciated.

Can you provide a picture?
To be hanging in the Drum, could it be a door switch?

The only thing I see that meets your description is a door switch at http://www.appliancepartspros.com/partsearch/model.aspx?model_id=44572&diagram_id=28453384#d28453384

We need a picture of the switch and a close-up of the wires and terminals.
DrTom4444

Drtom, that is a good source for appliance parts, I have had good luck with them.
Does the switch look like this:
Part Details - WHIRLPOOL SWITCH, DOOR, part number: AP4319999 (http://www.appliancepartspros.com/part_details.aspx?part_id=4319999)

That looks like a door switch which is the only one I know of there. Just find the two terminals that are open when the button is out and attach the wires there. You need a meter to test it. DrTom4444