Hi, I'm attempting to modify a Mazda 2 sport 2004 hatchback radio head unit. I wont bore you with the details, but I've done this on more modern head units to great success. However I'm having issue with this current one, as its older, things aren't as clear as I had hoped. I've included a photo. I'm just wanting to double check that the red & yellow highlighted points represent right channel & left channel audio. And the black PGND is a sufficient ground point. I've been looking over & I'm unable to find any other Ground points or right & left audio channel points. If anyone can spot more, please do let me know. My eyesight isn't the best so fresh pair of eyes may be needed.

Thanks in advance!