Using time bins from heatmap as timerange in data link graph

Hi all,

I have a heatmap where I would like to make a drill-down chart using a data link. The idea is to be able to click the link per square, and it will bring you to a different dashboard, where the minimum and maximum time of the bin is the timerange.

In my data, the bins are separated into groups of 5 minutes:

The heatmap graph works:

So how come the URL is empty for both variables
${__value.time} and ${__data.fields.time} when inserting into the data link? And what is the difference between the two?

Furthermore, any suggestions on how to get not only the time value but also get the value at the end of the time bin (start + 5 minutes)?

Very excited about making this happen, thank you for the help.