The present invention relates to an assembly method for a connector, in particular for a high-voltage connector, having an electrical conductor and an electric contact, which assembly method comprises the following steps: providing a screw having a first drive and a second drive which is formed opposite the first drive; establishing a connection with play between the electrical conductor and the electric contact by means of the screw by the screw being inserted respectively into a passage hole in the electrical conductor and in the electric contact and being turned in a first direction by way of its first drive; tightening the connection between the electrical conductor and the electric contact by the screw being turned in a second direction, which is opposite the first direction, by way of its second drive. The present invention further relates to a connector and also to a screw.