I am sure this is dirt simple but I can't figure out how tomate a cylindrical connector to a flat surface with respect toother parts in the assembly. For example in the picture below Iwant the cylindrical connector to be .5" below the part above and.5" to the left of the right side of that same part. I can selectthe edge but there's no "center" point to grab on the connector.How is this done?SolidworksAssemblies