[PVE-User] how to add existing partition as Volume Group ?

[Roland @web.de]

Hello,

i want to make remaining space of the two SSD boot disks available to
Proxmox VMs, so i created a forth Partition on those of type "LVM".

How can i make these available in Disks->LVM (i.e. proxmox managed LVM
storage), as the webgui only lets select me whole disks as LVM storage ?

I want to add LVM volumes on SSD to virtual machine to be used as ZFS
Slog/L2Arc in virtual FreeNas.

regards
Roland