Printed circuit board for contacting a connector system on the card side and/or computer side, wherein the connector system is designed to connect a PCB card to a central computer of a motor vehicle, and wherein differential pair signals can be conducted through the connector system along differential pair contact elements (13b, 33b) of the connector system, having: - a plurality of pair contact points for contacting differential pair contact elements (13b; 33b) of the connector system, wherein each pair contact point has two individual contact points for contacting individual contact elements of the respective differential pair contact element (13b; 33b) of the connector system, - at least one first routing channel, through which conductor tracks are routed to the individual contact points of at least one of the pair contact points; wherein - a first group of the pair contact points is arranged one behind the other in a first row on the printed circuit board, - a second group of the pair contact points is arranged one behind the other in a second row on the printed circuit board, wherein the second row is arranged parallel to the first row, - conductor tracks are routed through the first routing channel to the two individual contact points of at least one of the pair contact points of the first group, - the first routing channel is arranged between the first row and the second row in such a way that it is arranged parallel to the first and second rows (R1, R2), - conductor tracks are routed through the first routing channel to the two individual contact points of all the pair contact points of the first group, which are not arranged at a connection end of the first row, with respect to which the conductor tracks are routed away from the individual contact points through the routing channel, characterised in that - the conductor tracks are routed to the individual contact points of the plurality of pair contact points of the first group in at least three planes one above the other through the first routing channel, wherein the conductor tracks to the individual contact points of that pair contact point of the first group arranged furthest away from the connection end are routed in the same plane through the first routing channel, and the conductor tracks are routed to two centre pair contact points of the first group, each in a different plane, through the first routing channel. - a plurality of pair contact points for contacting differential pair contact elements (13b; 33b) of the connector system, wherein each pair contact point has two individual contact points for contacting individual contact elements of the respective differential pair contact element (13b; 33b) of the connector system, - at least one first routing channel, through which conductor tracks are routed to the individual contact points of at least one of the pair contact points; - a first group of the pair contact points is arranged one behind the other in a first row on the printed circuit board, - a second group of the pair contact points is arranged one behind the other in a second row on the printed circuit board, wherein the second row is arranged parallel to the first row, - conductor tracks are routed through the first routing channel to the two individual contact points of at least one of the pair contact points of the first group, - the first routing channel is arranged between the first row and the second row in such a way that it is arranged parallel to the first and second rows (R1, R2), - conductor tracks are routed through the first routing channel to the two individual contact points of all the pair contact points of the first group, which are not arranged at a connection end of the first row, with respect to which the conductor tracks are routed away from the individual contact points through the routing channel, characterised in that - the conductor tracks are routed to the individual contact points of the plurality of pair contact points of the first group in at least three planes one above the other through the first routing channel, wherein the conductor tracks to the individual contact points of that pair contact point of the first group arranged furthest away from the connection end are routed in the same plane through the first routing channel, and the conductor tracks are routed to two centre pair contact points of the first group, each in a different plane, through the first routing channel.