To find the precise location for *your* Escalade's year and model, you should consult your vehicle's repair manual or a reliable online repair database specific to your vehicle's year, make, and model (like AllDataDIY or Mitchell 1). These resources will provide diagrams and instructions.
Caution: Working with the airbag system is extremely dangerous. Improper handling can lead to accidental deployment and serious injury. Leave this task to qualified professionals unless you have extensive automotive electrical and airbag system experience.