Looks like the Denali lights could do on both fork and mudguard according to their videos where it is said that the Denali catalog includes all needed accessories to fit any bike and mounting locations.
On a different video by a generalist accessories shop, they insist on the premium quality of the Denali products (such as their water proof and connections).
The most discreet models are the DM "optimized for mud guard mounting" (ref. picture below) and the D2 models.