Prius NHW20 Aftermarket Radio Install (Two Cars)

Hi everyone,

I'm installing a standard universal Android head unit (came with standard ISO harness, GPS 4gb/64gb ROM. 8 Core CPU) into two different NHW20 Priuses and need a confirmed list of adapters/pins for each. I'm aiming for the No-CANBUS path on the base model, but may need one for the Navi car.

Car 1: Base Model (Dad's Car)
Model: 2007 Toyota Prius NHW20 (European Spec)

Features: Base Radio, No Navi, No JBL, No Factory Camera.

Goal: Clean install with NO CANBUS BOX.

Question Required Part / Splice Needed? Pinout / Wire Confirmation
1. Switched Power (ACC) The factory harness lacks a Red ACC wire. What is the safest, most reliable fuse to tap in the interior fuse box (driver's side) to run to the new radio's Red ACC wire? (e.g., P/OUTLET, ACC, etc.) N/A (Fuse location needed)
2. Climate Control Fix I plan to use the 68-Ohm Resistor fix. Confirmed? Splice between Pin 9 (Pink) and Pin 10 (White) on the unused 20-pin plug?
3. Steering Wheel Controls (SWC) I plan to manually splice/tap into the factory $28\text{-pin}$ plug. Confirmed Pinout: Key 1 to Violet (Pin 21), Key 2 to Pink (Pin 22), GND to White/Black (Pin 11)?
What else important am I missing?
Car 2: Navi Model (My Car)
Model: 2006 Toyota Prius NHW20 (European Spec)

Features: Factory Navigation, Factory Bluetooth, Factory Rear Camera, Self parking

Goal: Retain Camera/SWC/MFD functionality.

Question Required Part / Splice Needed? Pinout / Adapter Confirmation
1. SWC/ACC Power Can I use the same No-CANBUS approach (Fuse Tap + Manual SWC Splice) as the base model, or is a CANBUS module required due to the Navi system? If CANBUS is required, which Box model is best for a Navi Prius? Ill probably source it off Aliexpress/Temu
2. Factory Rear Camera The factory camera runs on 6V, but the radio needs a 12V Reverse Trigger and RCA input. What is the specific Camera Retention Adapter (12V to 6V reducer) and RCA cable needed for the NHW20 factory camera? Is the AHD stuff off of Temu/Aliexpress better / does it make sense to get a better one?
3. Camera Trigger Wire Which pin on the 28Pin plug (or elsewhere) provides the 12V signal when in Reverse gear? Reverse Trigger Pinout needed.
4. Factory Bluetooth Confirmed: I must use the new radio's BT and mic, and the factory BT is disabled?
Ideally on this i'd keep my factory BT and reverse camera on the OEM MFD (if somehow possible), then just add this better radio, modern navigation / diagnostics and maybe a DVR in the future to the new radio (whilst keeping SWC working)...

Any confirmed pins, specific European part numbers (for fascia, camera adapter), or links would be hugely appreciated! Thank you!