Fence Diagram Site Map: How do I change data marker colours in my site map on fence diagram?

I have recent BH data and Historic data and I would like to represent the Point ID with different colours e.g. red for recent green for historic.

I am able to do this in the Site Maps under SM report properties>Data Rep>Data Marker Color Exp (output below and expression used)

However, how do I represent this on my fence site map?  I have also noticed there is no option for this in the site map tab too.

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