Fan wiring

Technical Area Electrics & ICE
1
  1. My model of MX-5 is: __1993 Eunos
  2. I’m based near: __Crowborough
  3. I’m looking for technical help or recommendations on: __Fan wiring
2

I’m replacing my radiator and adding a T7 fan shroud , can anyone tell me which is the positive wire on the plug, they are both a dark brownish colour with light brown rings but one has a blue stripe.

Thanks