These Mini-Cons are super smart and are great with technology. Many of these brainiacs are placed aboard Cybertronian spaceships as guards. They are outfitted with a large arsenal of weaponry in order to defend themselves from Decepticons.
In Pilot (Part 1), Fixit was among the Caretaker Mini-Cons stationed aboard the Alchemor when it crashed on Earth.
As revealed in Decepticon Island (Part 1), many of the other Mini-Cons aboard also survived the crash, but were enslaved by the Decepticon prisoners they'd been guarding and put to work repairing the ship.
In Deep Trouble, Strongarm encountered a large number of apparently mindless Caretaker Mini-Cons aboard the ship Octopunch was using as a hideout. Though she expected them to be helpful and friendly like Fixit, they bunged her in a room and locked the door
In Decepticon Island (Part 2), the Mini-Cons aboard the Alchemor were eventually freed by the Bee Team, and used the repaired ship to take the Decepticon prisoners back to Cybertron.