Create your plan as your stage currently exists. This usually means adding FOH speakers, monitors, drum risers etc.
When you share your plan, the band can simply drop their instruments onto the stage.
You have the option to prevent the band from moving your equipment around on stage if you choose (useful if your FOH speakers and/or monitors are fixed, but less than ideal if you include DI boxes).
When the band has added their instruments, they can send you an email with the URL .