RIPE sent me a second probe for my backup internet connection about two weeks ago. I had the original v3 probe connected to the UDM Pro, now with the 2nd probe (a v5 probe), I connected both directly to the Fritzboxes. The Vodafone Cable probe can be found here, the Telekom DSL probe is here.
I will replace the Telekom connection with a Deutsche Glasfaser connection when they decide to build it. It is already preordered.