Hi Sam,
SIC codes are not addresses so are not plottable as such. You would need to filter your business listings by the SIC code then display the set. As you likely already know, we do not have anything called a "SIC Code" in our data. However, you can try the SDS "Entity-type" value to see if it aligns with your needs. See https://learn.microsoft.com/en-us/bingmaps/spatial-data-services/public-data-sources/poi-entity-types
Sincerely,
IoTGirl