
Ubiquiti UniFi Cloud Key

Ubiquiti UniFi Cloud Key
Hello, I have a USG and 2 AP AC-Pro in operation. As a controller I use the software from Unifi on a Windows PC. I don't have a cloud key yet because I don't understand what it is needed for - everything I expect works at the moment. Now I want to set up a second site (connected via the public internet). The main goal is to get access to a few Shelly controllers at the second site, which I want to configure remotely with API commands. My (amateurish) idea is that a USG is also used at the second location for this purpose and the two USGs then span a VPN across both locations. I imagine that at least initially I should be able to access the USG at the second location remotely with a controller. What do I need to do this? - Can I do this without a cloud key from my existing Win PC (i.e. after the initial configuration of the USG and the VPN, of course)? Or do I need a PC locally at the second location (with controller software from UniFi), which can be controlled via remote software, for example. - Or do I now need one or even two UniFi Cloud Keys?