Hello,
Are you using VeSys 2.0 version 2014.1?
If you are then you can insert a diode/resistor (or any device) directly into a bundle. From VeSys 2.0 Design, simply connect the diode with wires and ensure both the wires and diode are given the same harness attribute. When you synchronise the connectivity into your harness design you will see the diode (device) available to place within a bundle (as you can with a splice). The process is very easy, and with 2014.1 you no longer need to represent the diode with a connector
Thanks,
Nuri