H1B stamping along with H4 (Dropbox)

We recently got appointment for my spouse’s H4 dropbox. I couldn’t get an appointment for my H1B dropbox yet. I don’t recall the system asking to add my spouse as dependent while filling the appointment form. So, we have been trying separately for appointment.
Could we both go for dropbox using my spouse’s appointment since in her DS160 I’m listed as primary applicant? Or, do I need an appointment of my own?