I think adding an extra image that shows the first 100 mm of extension, maybe with a little arrow on the sprocket that shows it rotating CW.
Something like:
Step 1.5
Extend the chain, it will flow over the sprocket CW and toward the center of Maslow. The first 100 mm extrusion should look like this (picture as described) Keep extending until that small length is long enough to reach the right sprocket. This will take a couple minutes.
Then continue with step 2 as it is.
I think the key here is to show what to expect. If I knew to expect it to take a while, then past me would be less likely to just swing the excess over and call it good. Currently the middle image of the overall set up was not useful, at least for me, the important parts were too small to see. However, I do think having the overall set up pictured in the calibration process is important, just not at this step.