Loose wire on Whirlpool electric dryer LDE5750W2

I have a Whirlpool electric dryer Model LDE5750W2 from 1980 -- worked very well so far, I only had to replace the heating element once and now I have a broken belt. I opened it recently because the belt snapped, when I did that I noticed a loose blue wire at the motor -- of the 2 blue wires it is the blue wire closer to the front. (see the picture).


The motor has 2 red wires, 2 black wires, 2 blue wires, 1 white and 1 yellow attached to it plus the green for ground, but the sticker on the switch only labels 3 of them as BK, BU, Y and then 1 and 2 in Red. The 3 letters seem to correspond to the wires toward the rear.

The front blue wire seems to have slipped off the post, the connector looks like it has expanded and got loose. Hard to imagine the spade connector just expanding, is that known to happen?

The dryer was working fine until the belt snapped, does that mean the blue wire was on (although loose) and came off when the belt broke? Or is it possible it was always off and the dryer still worked anyway? What does this blue wire do -- what does it connect to or what circuit is it? Does anyone have a circuit diagram or service manual?

Also, can I just crimp the loose connector and put it back on, or do I need to put a new connector on the wire?

Thanks for the help.

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