A method performed by a User Equipment (UE) for managing Uplink (UL) transmissions between the UE and a second network node in a wireless communications network is provided. The second network node serves a target cell comprising a first UL carrier and a second UL carrier. The UE receives a message from a first network node. The message relates to a handover of the UE to the target cell. The message comprises an indication indicating one or more UL carriers of the target cell. The UE then decides which one or more out of the first UL carrier and the second UL carrier that is corresponding to the indicated one or more UL carriers. The decided one or more UL carriers are for random access in the target cell.