Wiring harness design in CATIA V5 - 3D modeling Week 5 & 6 Challenge

HOW to create wiring harness a and b and how to combine the wiring harness a and b ?
Intially i create refrence sketch in part work bench , and then i copied that refrence sketch and paste inside the assembly workbench ,then copied electrical defined connector from electrical part workbench and it can be pasted inside the assembly workbench and then open wiring harness assembly work bench can be open and add bundle between two connectors and add branch point to that bundle and create different types of branches and do routing process now the wiring harness assembly process is done and now create another wiring harness assembly b by using same process as early we used .
and now open assembly workbench and copied wiring harness a and b , and paste inside the new assembly workbench , in new assembly workbench open the assembly wiring design and click on the electricall connected device option and attach the both electrical parts.