XDJ-XZ compatibility with Roland drum machines

Hi everyone,

I am interested in buying the 4-channel XDJ-XZ controller. I know that the standalone only functions with 2 channels, but am curious if I can connect a roland drum machine like the TR-08 or TR-8, to the 3rd or 4th channel to play simulatenosuly with the 2 standalone decks using rekorbox or serato. Does anyone know if this is possible? It would also be cool to be able to sync the roland machines using TR-SYNC with serato on the 3rd or 4th channel while playing standalone on the first two decks.