Which node do I use?

I’m a complete novice at this so please bear with me.

I’ve set up an emon Tx and an emonbase (Raspberry Pi Model B and RFM69PI); I think I’ve done everything correctly.

Under “Log Locally” in the Setup guide it says:

You should now see an updating input list of connected nodes (e.g emonPi, emonTx, emonTH) and they keys (e.g. power1, power2 etc.) together with the last received value.

But what I’ve got is “node 16” , “node 17” and “node 19” (see screenshot)

What do these mean and which input/node/key should I use to start logging the power data?

Hope this makes sense