The arrow shows where the chip will go, and by extension, where the thing I photographed earlier will go.
Here's the GitHub repository for the entire ATM.
https://github.com/bleskomat/bleskomat-diy
And here’s a video of the machine in action
https://youtube.com/shorts/hAA5bDZIOO8?si=2a8mPL1mX-BFYf3G
