Sprctre simulation with no schematic cells....

Hi Team

I want to simulate the top level of my IC with the ESD device. However, the ESD devices from the PDK are modeled without schematic views. The available views are auCdl, auLvs, hspiceD, hspiceS, layout, spectre, symbol.

Can anyone teach me how can I simulate these ESD devices in my simulation?

Thanks

MD