The EPOC Flex is flexible in wire position and number of sensors. By default all 32 sensors + 2 references are already fitted into the two connectors. As shown in the image below, 16 blue sensor wires + CMS a black wire is on the left. 16 red sensor wires + DRL a black sensor wire is on the right. The connector has one empty position above the references. EMOTIV has wired up the electrodes so that the electrode name A-Q matches the pin position shown below.