Install Magisk via TWRP - problem with slots

AB + twrp: How do the slots actually work? : rLineageOS twrp slot a slot b Slot on Android via TWRP How To Port TWRP To AB Partitioned Devices Running hurahura slot b Setting current slot to 'b' OKAY finished total time I also used his twrp guide, for exemple he claims that only twrp

pg slot mobile Boot TWRP in slot a; Install LineageOS , TWRP will install it to slot b! Flash to slot b