Over all the years of using Access, I have never used the so called Wizard to split my databases. I have never seen the point in it.
On a new application I'll keep everything in one .accde as I find it can be easier in the early days. Then I'll create a new BE database and import just the tables that are required in the BE. Then delete them from the FE. Compact both and invoke my re-linking function in the FE. Job done.