Deploy traefik and reuse existing PVC

Hi. So I admit, I am a bit of a noob when it comes to PVs and PVCs! I am on DigitalOcean and I already have two VC's for a mongo database. I am charged per every instance of VC's. It should be kosher to re-use one of these VC's for traefik, right? How would I go about reusing a PVC claim when deploying Traefik via Helm?