A connector assembly for removably attaching a plurality of leads (200, 210) to an implantable medical device, comprising: a connector block housing having a first end and a second end, wherein said connector block housing is in electrical communication with a pulse generator assembly; and a first lead insertion lumen (164; 464) extending through said connector block housing from said first end to said second end and providing two points of entry (166, 168) through said connector block housing and into said first lead insertion lumen, said first lead insertion lumen further comprising a plurality of electrical contacts disposed within said first lead insertion lumen and configured to direct an electrical pulse from said pulse generator assembly to a lead (200, 210) positioned within said first lead insertion lumen, characterised in that: said pulse generator assembly is programmable to direct a first electrical pulse to a first plurality of electrical contacts (192; 492) within said first lead insertion lumen, and to direct a second electrical pulse to a second plurality of electrical contacts (192; 492) within said first lead insertion lumen, and wherein said first plurality of electrical contacts are configured to transfer said first electrical signal to a first lead positioned within said first lead insertion lumen, and said second plurality of electrical contacts are configured to transfer said second electrical signal to a second lead positioned within said first lead insertion lumen. a connector block housing having a first end and a second end, wherein said connector block housing is in electrical communication with a pulse generator assembly; and a first lead insertion lumen (164; 464) extending through said connector block housing from said first end to said second end and providing two points of entry (166, 168) through said connector block housing and into said first lead insertion lumen, said first lead insertion lumen further comprising a plurality of electrical contacts disposed within said first lead insertion lumen and configured to direct an electrical pulse from said pulse generator assembly to a lead (200, 210) positioned within said first lead insertion lumen, characterised in that: said pulse generator assembly is programmable to direct a first electrical pulse to a first plurality of electrical contacts (192; 492) within said first lead insertion lumen, and to direct a second electrical pulse to a second plurality of electrical contacts (192; 492) within said first lead insertion lumen, and wherein said first plurality of electrical contacts are configured to transfer said first electrical signal to a first lead positioned within said first lead insertion lumen, and said second plurality of electrical contacts are configured to transfer said second electrical signal to a second lead positioned within said first lead insertion lumen. said pulse generator assembly is programmable to direct a first electrical pulse to a first plurality of electrical contacts (192; 492) within said first lead insertion lumen, and to direct a second electrical pulse to a second plurality of electrical contacts (192; 492) within said first lead insertion lumen, and wherein said first plurality of electrical contacts are configured to transfer said first electrical signal to a first lead positioned within said first lead insertion lumen, and said second plurality of electrical contacts are configured to transfer said second electrical signal to a second lead positioned within said first lead insertion lumen.