Which cable is for which antenna?

Hey folks

I would like to build a PRVCY phone out of the Pixel 6A and wanted to know which of the small signal cables are for which technology?

I've like to disable the cellular and only use WiFi (and/or possibly a USB-Data connection or mobile NIC). Now as it's likely not easily possible to overall shutdown the cellular modem, which would be the best and also further contribute to power saving, I might have to disable or take out the cellular signal connection towards all cellular antennas.

Also assuming the cellular antennas itself, are inside the frame and again itself can't be removed.

QUESTIONS:

1. Which chip is the cellular modem or is it only integrated into the SoIC (main CPU Chip)?
2. Can it somehow be disabled or power cut from it?
3. Which of the small signal cables are for cellular (and are some shared for Wi-Fi/BT?
4. Which of the connection points in the back plane are for the cellular antennas and are these fully dedicated for cellular or (partly) shared for Wi-Fi and or Bluetooth use?

Additonal questions:

• Which orhter phone repair / mods forum ist good for questions like that?
• Where do you get replacement parts for the Pixcel phones (besides AliExpress where you find a lot)? Can only official repair shops get (official) replacement parts?

Thanks,
Norb