Out of phase - Need help - Passive EMG (GZR/MMHZ)

[K-2]

Hello all!

Really need your help on this one.
I'm having an issue of pickups being out of phase - on their own they sound as should, no buzz or noise. If blended together - there is only hi-mid/treble content left.
I have searched on google and in forums. Couldn't find an answer that would really help me. My understanding from answers is that hot and ground wire should be switched on P pickup and that it help most of the individuals who asked for a solution. Well, I'm using EMG system, not really versed in electrical stuff too, and I'm just stuck.
Before contacting EMG for support I thought I'll pop here.

Everything is passive. Pickups are - EMG GZR and EMG MMHZ, going to a balance pot and to volume.

Please let me know if you need a picture of specific part from specific angle, bass is dismantled near me, so I can take it any minute.

Thank you all in advance!