Adding vehicle attach points to models

How would I do attach points for models, not really dealing with Lua, so it’s more of a modeling part for now.

From a modelling point of view, perhaps you could add a bone that you later get the position of with Entity:GetBonePosition ?

Modelling forum is there:
http://facepunch.com/forumdisplay.php?f=40

( Basically, they are defined in the .qc and are parented to a bone )