There are two positions for the (original) Joolz cup holder when placed on the Joolz Geo pram. Please see these outline below -
1. On the lug on the inside of the handle bar (remove the chassis clamp from the cup holder). See below image 1
2. On the lower part of the main chassis arms, where the JOOLZ logo is below the folding buttons (this position requires the chassis clamp to be attached). See image 2 & 3. If you're using the Nursery bag at the same time you may find this option is more convenient.