I inserted an excel spreadsheet into a solidworks drawing template that will automatically set part tolerances based on the type of part being specfied.

The spreadsheet currently has a validation cell built into it so it will allow the user to select the part type and and units they want to use.

The tolerances will automatically be displayed in the tolerance block based on the part type.

Is there a way to link a cell in this embedded object to a Custom Property in Solidworks? 

I'm ultimately trying to force users to use the custom properties tab to change properties instead of messing around with clicking on embedded excel files in the template.