[Tagging] How to match multiple destinations and destination:ref?

[António Madeira]

Hi there.

I've stumbled with a problem for which I couldn't find a satisfactory
answer.
Say I have a destination sign in a motorway junction exit with 4
destinations, but only the second one has a ref. How do we match the
right destination with its ref?

I've noticed that we can use "none" in the destination:symbol tag. Could
this be applied here too?

Regards.