Some Suntour forks have mounting holes for attaching a cable guide for a headlight that runs on a hub dynamo.

Page 96 & 97 of the 2014 Suntour Catalog you can see the cable guide:
http://issuu.com/why_gbr/docs/srs-2k14-low

The cable guide isn't used in the following photo but the cable is attached using the mounting holes.

Photo: http://www.electricbikemag.co.uk/Ima...ews/daum06.jpg

The two holes that are opposite each other are fender mounts for certain types of fenders.

Here's some photos:
http://www.bike-discount.de/media/or...321_249491.jpg
http://www.bike-discount.de/media/or...327_249521.jpg