An electrical connector assembly (100, 122, 134, 204, 224) for a medical device, the electrical connector assembly (100, 122, 134, 204, 224) comprising: a flexible circuit (102, 202, 242) comprising: a base area (112, 210, 250); at least one tab area (116, 214) extending from the base area (112, 210, 250), the tab area (116, 214) being configured to be folded substantially perpendicular to the base area (112, 210); a plurality of contact nodes disposed on the base area (112, 210, 250); a plurality of contact pads disposed on the at least one tab area (116, 214) at an end away from the base area (112, 210); and a plurality of electrical pathways (120, 236, 276) individually connecting each of the contact nodes to one of the contact pads; an internal holder (104, 126, 138, 206, 226) comprised of a face area and at least one side perpendicular to the face area, wherein the base area (112, 210, 250) of the flexible circuit (102, 202) is disposed on the face area of the internal holder (104, 126, 138, 206, 226) and the at least one tab area (116, 214) is disposed on the at least one side when folded; an encasement (106, 124, 136, 208, 228) surrounding the flexible circuit (102, 202) and internal holder (104, 126, 138, 206, 226) and having an opening at one end, wherein the encasement (106, 124, 136, 208, 228) is configured to be attached to a second electrical connector assembly (100, 122, 134, 204, 224) and wherein the opening is configured to allow electrical connections between the plurality of contact nodes disposed on the base area (112, 210, 250) of the flexible circuit (102, 202) and the second electrical connector assembly (100, 122, 134, 204, 224); the electrical connector assembly being characterised in that it comprises a conductor layer (128, 220) disposed on top of the base area (112, 210) of the flexible circuit (102, 202), the conductor layer (128, 220) having a plurality of conducting nodes extending through opposite sides of the conductor layer (128, 220), the conducting nodes on a first side of the conductor layer (128, 220) corresponding to and being in contact with the contact nodes on the flexible circuit (102, 202). a flexible circuit (102, 202, 242) comprising: a base area (112, 210, 250); at least one tab area (116, 214) extending from the base area (112, 210, 250), the tab area (116, 214) being configured to be folded substantially perpendicular to the base area (112, 210); a plurality of contact nodes disposed on the base area (112, 210, 250); a plurality of contact pads disposed on the at least one tab area (116, 214) at an end away from the base area (112, 210); and a plurality of electrical pathways (120, 236, 276) individually connecting each of the contact nodes to one of the contact pads; a base area (112, 210, 250); at least one tab area (116, 214) extending from the base area (112, 210, 250), the tab area (116, 214) being configured to be folded substantially perpendicular to the base area (112, 210); a plurality of contact nodes disposed on the base area (112, 210, 250); a plurality of contact pads disposed on the at least one tab area (116, 214) at an end away from the base area (112, 210); and a plurality of electrical pathways (120, 236, 276) individually connecting each of the contact nodes to one of the contact pads; an internal holder (104, 126, 138, 206, 226) comprised of a face area and at least one side perpendicular to the face area, wherein the base area (112, 210, 250) of the flexible circuit (102, 202) is disposed on the face area of the internal holder (104, 126, 138, 206, 226) and the at least one tab area (116, 214) is disposed on the at least one side when folded; an encasement (106, 124, 136, 208, 228) surrounding the flexible circuit (102, 202) and internal holder (104, 126, 138, 206, 226) and having an opening at one end, wherein the encasement (106, 124, 136, 208, 228) is configured to be attached to a second electrical connector assembly (100, 122, 134, 204, 224) and wherein the opening is configured to allow electrical connections between the plurality of contact nodes disposed on the base area (112, 210, 250) of the flexible circuit (102, 202) and the second electrical connector assembly (100, 122, 134, 204, 224); the electrical connector assembly being characterised in that it comprises a conductor layer (128, 220) disposed on top of the base area (112, 210) of the flexible circuit (102, 202), the conductor layer (128, 220) having a plurality of conducting nodes extending through opposite sides of the conductor layer (128, 220), the conducting nodes on a first side of the conductor layer (128, 220) corresponding to and being in contact with the contact nodes on the flexible circuit (102, 202).