Uh-oh... mystery 727 part in pan?

Ok- not 100% sure it was in the pan.

Background: recently replaced my servos, band struts, accumulator and valve body in the car. Decided to go to a different stall so dropped the trans (my first time) and while I have it out decide to go to a different KD level per the CRT valve body instructions.

After I got the trans out, I rolled it on its side, pulled the pan off, pulled the plug in the bellhousing to slide the old lever out and replaced it with the new one while I held the band strut in place and put the plug back. When I went to clean up a bit of trans fluid I saw this sitting in the puddle. Did it fall out of something when I was changing the KD lever? It’s a little hollow tube.

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