How do I create a mount point between two lxc's that is not on the host node?

[gege42o]

Hello, i have a proxmox with around 6 lxcs, i want to create a mount point that is named /media between a jellyfin lxc and a servarr stack that runs on a docker community lxc install. So far i have read that havinga mount point on the og host (by writing this command: pct set 100 -mp0 /mnt/bindmounts/media,mp=/mnt/media) ) works between two lxcs through the proxmox tech. Problem is my host only has 60gb allocated to the pve install and local lvm thin has aroung 140 gb, space which i need for my media? What would be the bes approach now, resizing the lvm-thin to have less storage and the partition for the host to be bigger or should i look into something else? i will soon also upgrade froma 256gb ssd to a 1 tb ssd and will clone this setup using clonezilla, but i want it working now so that after i clone it i just make it proportional or something and boom i have 100gb for pve install and the rest of 900gb for the data like media photos and all that. Please help i am stuck on this