The certified votes of states in dispute (battleground states) would not be counted, throwing the vote to the Congress, with each state getting one vote and the number of Trump states outnumbering the Dem states by one, leading to a Trump 'victory'. The idea is that their validity would be contested on Jan 6 in a formal setting.

And then:

Democrats justifiably raise hell, and the states in dispute are told to "go back to the drawing board" and, based on illegitimate claims of election fraud, come up with an alternate slate of electors, also throwing the election to Trump.

It's insanely evil and maybe ridiculous, but I believe that was the thinking.