2014 toyota avensis touch 2 wiring diagram

[2009joe]

hello i have a 2014 toyota avensis touch 2 headunit and im trying to find out whats the correct pinout for the Speakers and ground  and power plugs the white ones on the left. i see a few pinouts online and well im just wondering whats the right ones .i have one of those Alpine KTP - 445a    im going to wire in .i am going to make a custom plug and play cables so i have got all the cables just going to solder my custom harness together so all i have to do is plug it behind the headunit and to the amp should be a great job when finished .if someone can help with the right diagrams would be great .not sure if this is correct as i dont want to get the ground wires mixed up. tbh i have a plan not sure if its good .im going to run a wire right from the Battery to the amp and going to take the ground to a ground spot in the car is that a good idea or no please let me know what you guys think