headunit side didn't require connection to anything as far as i'm aware. I only tapped into left + right blinkers, and reverse light. idk what those connections at the headunit are for, but tutorial said to tape them off. my guess is that they'd be for canbus sensor?
Here's the tutorial link: https://wiki.dudu-auto.com/en/%E5%85%A8%E6%99%AF%E6%95%99%E7%A8%8B/%E6%8B%BC%E6%8E%A5%E6%95%99%E7%A8%8B
bonus tip if you don't want to drill any extra holes through your firewall to tap into front blinkers, buy cheap 18 to 22 AWG speaker wire from autozone or amazon or where you want, split the positive and negative/ground wires in half use as extensions to route to the trunk and tap into your blinkers there instead. inline wagos work fine, solder + heatshrink is best, or crimps + heatshrink to splice them. I guess you can also use wire nuts... i guess. just don't take the lazy/cheap route and use electrical/tessa tape. These are cameras you (presumably) want to use to check your blind spots after all.
This saved me a ton of effort since i don't have much space to drill additional holes in my firewall and i didn't want to have any wires hanging off my door grommets going towards the engine.
also, you'll probably need this when you finally calibrate:
https://forum.dudu-auto.com/d/347-dudu7-360-camera-calibration-parameter-definitions/8
