My understanding of your question is that you would like to assign some of the wires to go to specific harnesses and not all of the ones present under your project.
If so, then this can be done via setting the harness attribute on the wires.
So for instance if you would like wires 1 through 5 to go to harnesses H1 (this should be the harness design name), then you right click on the wires and select Set Harness Attribute and in the dialog fill in H1. On subsequent synchronization between the wiring and harness designs the wires shall be brought into the proper harnesses.
How would you define that a wire goes to 2 harnesses, for example a wire needs to synchronised into both H1 and H2? Are you able to add 2 harness attributes onto a Wire?
I believe that you can enter comma separated harness design names for multiple target harnesses.
Thanks Muhammad. I imagined you could but wondered the correct process, I thought it may be managed by using a delimiter in the Harness Atrribute field.
I was thinking the same too, will have to try it when I can