Unreal 4.6: is there a way via blueprint to attach a user interface widget to a skeletal mesh socket?

I am having some trouble figuring how to attach a user interface widget to attach to a skeletal mesh socket. I am able to do that with a blueprint object by using AttachToComponent node but for some reason I can’t figure out how to attach a user interface widget to a socket? AttachToComponent node won’t take a user interface widget as input Thanks