I'd suggest you label it as Non Clinical, since you spent far less than 50% of your time aiding injured folks, but include wordage in the title you give the space that refers to your first responder role. In the description, describe all your roles and be honest about the time spent aiding the injured. Let adcomms make up their own minds about what percent of the activity to assign to clinical exposure.
If you are desperate for clinical hours to list, then maybe divide the activity into two spots, each with their own dates, separate hours, description, and Contact.