How to Prune cucamelon?
No pruning needed

cucamelon · Melothria scabra
Also known as: mouse melon
Sow seeds in spring and keep at 22-24°C until germination, grow on at 18-21°C or plant out in moist but well-drained soil in a sunny, sheltered position once all risk of frost has passed, and provide support such as netting; roots may be lifted and stored overwinter in just-moist compost in a frost-free place and re-planted the following spring
No pruning needed