yep, the loose nut goes on the speedo side. make sure the speedo mech is sitting right. good to get it up on a front stand then you can spin it to make sure its good.
bit weird - when i tightened the spindle up past hand tight the speedo would slip out of the notches, and start spinning with the wheel, but then when i slackened it off, the speedo sat in the notches again fine ! so left it a bit slacker, then tightened up the 8mm bolts at the bottom of the fork legs