JP12 Split coils- coils 1&4

Hello everyone,
I have a Musicman JP12, bought it on 2013 and really love it since.
Though, the split coils position on jp12 uses coils 2&3.
I want to have an option to use also the 1&4 coils together (which should sound like 4th position on a strat)
I looked in the forums and YouTube but didn’t find someone who did a mod to use 1&4 coils together.
Anyone have done that or can help with that ?

Thanks!