Gutpile is right, they all have the stud on the bipod. Attach bipod first then attach sling to bipod.
I have always done it that way, until now. The VTR has two studs(2" apart). It actually makes it really convenient to pop the bipod of and on without having to mess with sling. Its a pretty good idea. As far as how to install a stud I cant help you there.
I 'm guessing just like you thought, drill a small pilot and use a bit of epoxy on the thread. Hopefully someone on here wil help ya out.