How to add a hard disk to VM via VRO

hello,

We have deployed VRA 7.0.1 in our computing environment and are having an issue.

We need to be able to add Hard Disks to the VRA created VM's through VRO.

This is a day 2 operation that we need to be done through VRO.

I have searched everywhere for this and can't find anything.

I have tried to do this by adding a disk via the builtin VC workflow but this doesn't sync with the VRA and therefore is problematic because it doesn't get reflected in the reservations of our BGs.

I have also tried to figure it out using the REST API and have not figured out how to do this.

any help would be greatly appreciated.

Thank you in advance!!