Hi,
Attached is a drawing of the centre stand pivot bolts. There is also a small spacer on one of the bolts (offside, I think) that prevents too much sideways movement of the stand - thus making the location in the spring clip more positive.
The order of assembly is to fit the stand first and tighten the pivot bolts. Then slide the springs onto the heads of the pivot bolts with one hook of the spring over the stand cross tube, then tension the spring and hook the other end over the lug on the frame.
Regards,
Eddie.