The Square Reader is a key piece of hardware in taking credit card payments via your kiosk for contactless payments and chip credit cards. If you are using a Square Reader you will need to connect it via Bluetooth to the KioskBuddy app. Alternatively, if you are using a Square Stand, a Square Chip Reader connected to the Square Stand via the dock should automatically be connected.
Open the KioskBuddy app on your iPad.
Navigate to the kiosk configuration screen (the one just before starting kiosk mode). If you're in kiosk mode, follow these steps to exit kiosk mode.
Scroll down and find the "Optional: Connect to a Square Chip Reader" section.
Tap CONNECT TO A SQUARE READER and follow the on screen instructions.
Note: If your Square Reader is connected to the dock, you will need to remove it to access the buttons in order to connect it to KioskBuddy.
Looking at "the back" of the dock, you should see a small notch about one inch above where the USB cord leads out of the dock.
Place your finger in the notch to gently pull up on the detachable piece that runs across the top part of the reader.
Slide out the Contactless and Chip Card Reader.
Clip the detachable piece back into the dock for safe keeping.
Sources:
https://www.sellercommunity.com/t5/Questions-How-To/How-do-I-take-the-square-chip-reader-out-of-the-dock-I-need-to/td-p/5753 https://www.sellercommunity.com/t5/Questions-How-To/How-to-release-reader-from-dock-once-latched-in-place/td-p/2744