Neodymium bar magnets, which way do I put them on?

[shoulderpet]

Hi

I have some Neodymium bar magnets and I have a cheapy ceramic P pickup that I am planning to replace the ceramic magnet with the neo magnets, I could only find the bar magnets in 20mm length bars so my plan is to put 2 bar magnets side by side for each half of the pickup but I was wondering if it matters which side round the bar magnets are, to explain what I mean if you add a magnet to the bottom of an alnico pickup if the magnet is the wrong way round it will repel, seeing as I will be removing the ceramic magnet completely and these are not alnico pickups there will be nothing to repel the magnet? so does it matter which way round I have the magnets ?  thank you