The antenna is placed vertically below the light. A protective cover - depending on its thickness and material - might impact the radar's performance.
Thanks! I just couldn't fine the info anywhere!
For even more geekery, check this out:
https://forums.garmin.com/sports-fitness/cycling/f/varia-series/296695/where-is-the-radar-part
Perfect! Thanks so much as I have looked for this photo showing the schematic, as it were. Saved the photo for reference! Stay upright!!