Stereo Wiring

Hello all, I have a 2017 Toyota Yaris iA. So I’m starting a project this weekend and wanted to see if anybody could point me in the right direction. I’m going to add a 5-channel amplifier for all 4 speakers plus a subwoofer. I know I have to use a line output converter to achieve this (don’t want to use speaker level inputs) so my question is if anybody has a wiring diagram for the infotainment system? I read somewhere the front speakers are wired through the tweeters. I also know the wiring for the stereo is behind the glove box. Thanks in advance!