I feel a bit stupid. I must replace the smallest and the middle chainrings in my Shimano XTR FC-M985 front drivetrain. There are two possible ways to orient the chainrings, and I do not know which one is correct. I disassembled the old chainrings without paying attention. The Shimano instruction sheet, as far as I can see, does not specify how to orient the chainrings - they probably assume that nobody can possibly be so dumb that he wouldn't know! Can somebody help me, please?