A modified insulation displacement connector block (10) has an array (11) of insulation displacement connectors (12). Each insulation displacement connector (12) is adapted to receive an insulated wire conductor (16) constituting one part of a twisted pair cable (24). The insulation displacement connector block (10) is provided with guide means (17) spaced relative to the connector array (11) so as to define a gap (21) therebetween. The guide means (17) is adapted for aligning each insulated wire conductor (16) with a selected insulation displacement connector (12), and further adapted to receive a length of each insulated wire conductor (16) extending from its selected insulation displacement connector (12) to a corresponding location on the guide means (17). In use, the said length of insulated wire conductor (16) bridges the gap (21), thereby to be presented for subsequent removal by a wire manipulation tool (23).