Just a heads up, the brighter bulbs have significantly shorter life spans. They're rated at 12.8 V instead of 13.2V for the same wattage. This means they use more than the rated wattage at higher voltages, burning them out very quickly. I'd also be leary of this because of the interesting headlight ...

So starting with the TCV: Yellow/wastegate goes to the metal tube that's by itself near the trans dipstick. No check valves there. This one here: https://www.matthewsvolvosite.com/forums/download/file.php?id=22110&t=1 Blue/fresh air goes on the bottom of the tube right after the MAF on the fitti...