Here are a couple of quick demo videos that outlines both the setup steps described above and some further benefits of vVols such as importing Everpure Protection Groups, using SPBM and restoring individual disks.
Part 1: Setting up vVols for use with VMware Cloud Foundation as Supplemental Storage
Part 2: Using vVols with VMware Cloud Foundation
This KB article shows how to connect vVols as Supplemental storage to a VMware Cloud Foundation Workload Domain.