Frame Down Tube Question

[mep]

First of all, thanks to everyone who has given up their knowledge and experience with the Nomad on this forum...you have helped make my transition from other makes/models much easier. This question has been bugging me for a few days, however, and figured that someone out there might have the answer...

When I removed the manufacturer's sticker from my 2008 Nomad's frame down tube (right side), I noticed that it was covering two tiny holes about 1/8" in diameter and about 3" apart (they are not capped). Does anyone know what they are for?

Thanks in advance.

Mark