Firstly borders in VeSys 2.0 Symbol should be saved within a "border library", these "border libraries" are different to normal "symbol libraries" (this is a common mistake). Once you have your border, from VeSys 2.0 you can select the border by running "Graphics --> Border", to set the default border edit the style for Wiring or Harness.
Let me know if this works OK,
Yes, that did work. Thank you!