R&D Headquarters
Cartridge
Players call it the yellow disc or the memory card. Only a shrunk player can pick it up. It goes in the slot of the dials, about 12 m away. Until it is in, the dials do nothing.
What it is for
Puzzle page: Floppy Disk Doors · How it works
Where the walkthrough uses it
2-3 Dahne’s Laboratory· step 4both players
The small player takes the cartridge from the guinea pig cage, just past the circuit board's exit hatch, and the big player puts it in its slot. This turns on the camera screens and the dial buttons.
Where to find it
No item spot is random: the game files place every item in the same spot in every game. Some items exist several times at once, such as the fuses in the Time Maze. From the game files: the area is loaded at these checkpoints. A door on the way can still be locked at some of them.
Cartridge
Headquarters, Dahne’s Laboratory, guinea pig cageShrunk player only
Room: Dahne’s LaboratoryHow to find it
Inside the barred cage with the rounded red roof: the home of Clive, Dahne’s guinea pig. It lies on the white floor of the cage, between the pet’s bowls. Only the shrunk player can pick it up.
5 mSeen from above with the ceiling removed. Yellow ring: this spot. Small labels: other spots of the same item close by (select one to go to it). 
The spot seen from nearby (rendered from the game's own level geometry).
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