Thanks! I like that! Gears are turning.......
After flipping the brackets around, they lined up perfectly with my OEM spoiler holes. Since my OEM spoiler was falling off thanks to previous owner(s), I figured I'd replace it with something better.
Some more expensive chase bars have amber turn signals - the turn signal wiring for mine uses the red tail/brake lights, which I didn't really want so I didn't wire them. It's also always running tail/running lights if it has power, which I didn't expect - I didn't want to bother running diodes in-line to make sure I had running lights on with headlights, brake lights on with or without headlights, etc. so I just leave my headlights on all the time so it doesn't look weird having chase bar running lights without taillights on. Probably safer anyway!