On the top of Yozh robot, there is a top plate containing the following elements:
The main MCU (ESP32-S3 Feather ), with 240x135 color TFT display, reset button, and three buttons (labeled A, B, C) for user interaction
two Qwiic/Stemma QT I2C connectors
several connectors for connecting additional electronics (see FIXME for details)
a number of 3mm mounting holes for attaching additional electronics
The top plate is mounted on the robot using 20mm long M3 standoffs. If necessary, it can be removed to access the robot interior. Warning: always turn the robot off before removing the top plate or doing any other work on the robot.
The diagram below shows dimensions and hole locations.