Your 6 panels in Series is 240V 10ASo if the charge controller doesnt add up volts just Amps, then it seems it's only benefit would be reducing my wire size coming from the panels to charge controller. That way it can stay at 10guage
Your 6 panels in Parallel is 40V 60A
You can also wire 3 in Series 2 Parallel for 120V 20A output.
Or
2Series 3Parallel
Your MPPT scc also needs higher than battery voltage and to be in a working voltage range.
Look at the specs on MPPT scc's.