Want more than 4 EmonTHs

I continue this thread since the topic is much the same, feel free to correct me if i wrong.

I have ordered 7 emonTH V2 -Temperature & Humidity Node (RF node ID (unique per network)
(and 1 emonbase and emonTX and current sensors CT) Order #16209

in the comment I have wrote:
Order Instructions/Comments
Since I have bought 7 emonTH v2 nodes, please set them up with unique ID.

And now that the items are on the way I read on my order web-page:
Glyn: This can be done via serial config. Node decoders entries will also need to be setup on emonBase SD card

Looking around this community it’s seems I need a cable

“Node ID can be set by us before shipping”

So the question is:
do you have set them up with different ID?
if no, is there an howto to read to set them with a unique ID?

I hope to not to have to buy other cables because the cost to sent items in Italy has been very high.

thank you.