I see many prost asking how to drive a complete assembly with a DT. The attached file contains a sample assembly driven by a design table that have a small product configurator inside.
Open the assembly, then open the design table, this will show a "product configurator data input form" enter any values there and close the table. The assembly will change to the new configuration.
The design table range is hiden, to see how the design table is build open a copy of the design table that is included inside the ZIP file.
This is a very simple assembly, but he will give a basic idea on how to do this on large assemblies.
Another example of a parametric assembly driven by DT is at https://forum.solidworks.com/message/247837#247837