It might be better to take a pic though that tool when the scope is pointed at a darker surface so we can see the inside of the scope better.
To adjust for the sky brightness, your camera is stopping down, making everything else appear black, with no details.
Your Tool, by the way, is a combination tool, combining sight tube (the crosshairs) with a Cheshire (the bright white circle with dark center)
I think that may be why Celestron calls it a "Collimation Eyepiece"
Here is the kind of image we need to see (there are residual errors in this collimation, too--centering, rotation, tilt, et.al):
Edited by Starman1, 14 August 2021 - 11:52 AM.