you don't need to remap any pins. (unless your trying to use a pin marlin has already allocated)
remapping is for pins that have a function in marlin.
your using direct pin control "M42 P32 S0" [marlinfw.org]
P32 is the pin your settings (Arduino pin name D32)
Use D4 or D5 on the Servo plug, just change M42 P32 S0 to M42 P4 S0 etc.
The main catch is you cannot use locked pins (pins controlled by marlin) .. do a M43 to list all pins and if they are locked or not
remapping is for pins that have a function in marlin.
your using direct pin control "M42 P32 S0" [marlinfw.org]
P32 is the pin your settings (Arduino pin name D32)
Use D4 or D5 on the Servo plug, just change M42 P32 S0 to M42 P4 S0 etc.
The main catch is you cannot use locked pins (pins controlled by marlin) .. do a M43 to list all pins and if they are locked or not