Similar to how Chen Chen had decoded the chip from the movie Upgrade, he first created a port for him to plug the T-800 main control chip inside. Before connecting it to the computer, he poured liquid nitrogen as a coolant to cause it to malfunction before being connected with Little X.
As the chip slowly thawed out bit by bit, before it even had a conscience of what was going on, Little X began to devour it in small chunks until its conscience was wiped away completely.
As seen in the movie, Skynet was lurking everywhere. The chip in these terminators could very well be a part of Skynet. This was something Chen Chen could not afford to overlook.
"I've erased the T-800 program from the chip!"
As the chip completely defrosted, Little X's response came as well. "Compared to the STEM chip, the T-800 chip's resistance is a drop in the bucket!"
"That's normal."
