In future versions of QET, such splices will have to be built in to make clear, in which way the cabling has to be done. However, this must be an automatic feature in the software when you make your connections between the terminals.
With the “Splice” or “ThruSomething” elements, you insert non-existent parts into your circuit diagram, which appear as empty lines in the bill of materials.

These “elements” also make my life quite difficult:
For some time now (not full time!) I am trying to develop a software-tool that automatically extracts a cabling plan from the QET schematic file. However, these “elements” are not allowed to appear in a cabling plan because they are not real components!
Not only these parts make it quite difficult to create such a diagram automatically - also the many possibilities to use references in circuit diagrams is quite complex...
But that's another topic!

It seems that you have not yet understood the principle of QET:
Connecting wires are only drawn from one terminal to another terminal! It is not intended to connect a new wire to a conductor somewhere: Only from terminal to terminal!
Connection points are set automatically by QET.
Therefore there is no need of connection-points etc. in the toolbars.

QET is not a paint program: You make connections between terminals.

It would be very interesting if these connections were somehow configured and automatic, as the project would gain a great designer.