Is it possible to use an asset to call the contents of these contacts?
Of what contacts? Asset determines what is displayed. Review what you want to display in CB Gallery > Media then set the Asset of the module accordingly. For example to display all profile gallery entries use the following.
profile.%
Edit: Also, it looks like the asset: profile. [User id] no longer works? I used it in this format: profile.504
profile.[user_id] should work perfectly fine, but the profile gallery you're trying to display needs to be accessible to the user who is trying to view it in the module. So if the viewing user can't go to that users profile and see that gallery then it's not going to display that profile gallery.