At 11:47 PM, Leo found it. A tiny, forgotten paragraph on page 94, sandwiched between a warning about not using the cutter as a stepstool and a recipe for "plotter-friendly cleaning solution." It read:
The LCD screen changed one last time:
Searching for SignMaster SC-3000 in Vulnus Accepto state... Handshake established. Uploading driver firmware... Do not disconnect power. Initiating soul-bond. signmaster install cutter driver