When setting up In Place Element structures, the current work flow is:
Drop the structure
Right click, add the node you want
Wire the reference / array / variant in
It would also be nice to wire the references I want to use to the border of my IPE structure, right click on the tunnel (c.f. for and while loop auto-indexing context, or shift register/tunnel) and select from a sensible list of incoming element types relevant to my incoming wire.
This would be fantastic to see alongside similar ideas such as this or this.