Maybe this will help. Let me know if you have any issues specifically and we can address them.
If all you need is relativity between objects on the site then the 10 minute average is fine and you don’t need an absolute global coordinate. If you do then you can use a PPP service or find a source of logs for a CORS station to PPK against. These are sometimes posted on a website. You might also research if you have that CORS service if it is free to access and you could then use your receiver to set an RTK point.