Load External audio file to Final Cut X Motion Template

Hello,
How to load external audio files to published parameters in Motion?
Scenario:
- Motion template [for FCPX] with audio behavior liked to various parameters
- audio behavior can not publish the audio source to FCPX
- in FCPX can not load audio file to motion template and react with audio behavior

Question:
How to load audio source in FCPX?
It can be done, some templates have this option, but I can not figure out how is done.
s15.postimg.org/4fq5nf4u3/Screen_Shot_20...3_16_at_12_14_04.png

Motion can not publish audio to FCPX templates at all.

How this was made? External audio inside FCPX. It most be a way.

There are two ways to make these templates. In Motion, and by coding in FxPlug, the effects scripting language FCPX and Motion use, which can also use Quartz Composer builds. My guess is, because they have a Chose Song button, this is FxPlug. Motion doesn't have that available. Thus, this was coded, not done in Motion as an FCPX template like we end users do it.