Ram on Xserve 2.26

Hi,

Just taken delivery of my Xserve 2.26 3gb ram.


I've got another 6gb to install and wonder what ports to use?

Currently A1, A2 and A3 are being used. Should i use A4, A5 and 6 or B1, B2, B3?

Thanks

Darren

EDIT - look as though i should be using B1, B2 and B3?