I'm having a hell of a time trying to figure this out and not even sure if it's possible.

Here goes

ive got a Marshall jmp1, amt p2 pedal, to electronics g major, Marshall 9100 power amp going into 2 Marshall 1960 cabs. Now my question is I'm after connecting it all up so I have 2 signal paths, both going into the g major and all in stereo. Etc

guitar > jmp1 >g major > Marshall 9100 > both cabs.

Guitar > amt p2 > g major > Marshall 9100 > both cabs.

This has been stressing me out all Christmas and I'm probably being dumb but can't figure it out.

Any help will be much appreciated