How to add a wire and a label to the power and ground pin in schematic

Hello, everyone,

The standard cells provide by foundry PDK have four power pins, VDD, VBP, VSS ,VBN. In layout, I connected the VDD and VBP together to VDD, VSS and VBN together to VSS. The schematic generated by importing the structured verilog file don't have wires to connect VDD and VBP, VSS and VBN. Just like the figure below,

I want to add a wire to connect VDD and VBP , VSS and VBN together for each cell, and add a label VDD, VSS respectively.

like below (I add the wire and label manually)

How to use SKILL script to achieve this effect in Virtuoso Schematic ?  Thank you very much. I will appreciate your help.

Best Wishes to everyone,

Jesse