On my 82 GPZ1100 B2 model the sparkplug wires(or Brit speak for the high tension leads)is secured to the coils with a ferrule on the sparkplug wire covered with a screw on cap for each port on the coil(s).
If your cables/wires are not removable this way perhaps checking with
www.z1enterprises.com
and buying the NGK sparkplug cable splicers will let you replace the ignition leads.
