My homelab is connected through an already existing wireguard network, with one server acting as a central hub for a bunch of other nodes. So all nodes can communicate to eachother by just knowing this central hub.

I would like my home assistant to join this network, which on most distros just means installing wireguard and wireguard-tools, plopping my config into /etc/wireguard, and running systemctl enable --now wg-quick@homenet. But I can't figure out if the OS on the HA Yellow have a package manager, and it doesn't seem to use SystemD. So what would be the best way to install it and connect on boot?

There is a Wireguard addon that I'm sure works wonders, but it seems to me that it's meant to act as this central hub that I already have. If I'm wrong and this addon can be used to connect to an existing network I will happily use that, but last time I tried it I couldn't get it to work the way I wanted.