How do I center the โ€œ๐Ÿ˜ƒโ€ between the rectangles?

Where it is currently _is_ the center of the parent, but I want it to be centered between the rectangles instead. Horizontally centered is the goal; vertically centered would be a nice bonus.

Image below; code here: https://gist.github.com/cliss/df21f012bfc44d94c033756bf970f1af

Centering Question

Centering Question. GitHub Gist: instantly share code, notes, and snippets.

Gist
@caseyliss
Sorry to bother you but could you tell Marco that there seems to be a problem with Overcast working with the latest watchOS 10.4. Everything works except the watch crown volume control. I think it is Overcast because Now Playing app works.
Love your podcast.
Youโ€™re help is appreciated.
Jim