Solar shading methodology query

[SimulatedJake]

I'm looking into the calculation methodology for the "Solar Shading Calculations tool", in relation to solar shading applied at construction level e.g an local shade local protrusion.
Following links are relevant:
https://help.iesve.com/ve2026/shading_devices.htm
https://help.iesve.com/ve2026/10_1_sola ... apache.htm

It indicates that if the window width is input incorrectly the calculation will be incorrect. I assume from the required information that SunCast is calculating angular transmission factors based on the distance between the right and left shade. I have been trying to verify this, but unable.

My query -
I have a single window with protrusions serving multiple spaces with a width of 2m. I have modeled 2 windows, one for each space with a combined width of 2 meters. If I set window width in the local shading in the construction to 2m, how does this impact a modeled window that is not 2m wide?