What you see in that photo is not exclusive to that particular Soleil Tombé. I’m sure that it looks like that not because someone chose not to push the connector all the way in, but because the design of the IEMs itself wouldn't allow it, at least not comfortably.
Jewel and Rn6, to name a few, have similar thing, but they’re not $8500.
In my opinion, Soleil Tombé should have better integration of the 2-pin connector to the shell like what we can find in Traillii which is more ideal for me, or at least like the one Mentor has.