https://www.amazon.com/LINKUP-RX6900XT-Shielded-Gen4%E2%94%83Dual-Connectors/dp/B092JSV8Z4?ref_=ast_sto_dp&th=1&psc=1 - here is amazon link, but it's 18cm, not 14cm.

This Link Up cable is the one used in a Dan A4-H20, I used this cable while waiting for my Louqe Cobalt riser to arrive and it works fine, correct orientation and screws in correctly.