Help adding drill-down links to timeseries panel?

I have a Timeseries chart that uses the “Partition by values” Transformation. I use this to plot multiple series on 1 graph. For example, trend line of 3 selected customers and the number of orders.
I would like to create a link for each Series (or customer) that takes me to another dashboard and populates a variable with the unique ID. How can I add a link to the series as a whole (not each data point)?
Thanks in advance.

Anyone can help with this please?