A set of removable plastic fixators for grouping from 2 to 9 wires with a nominal diameter of up to 1.5 mm. The fixators are designed to hold and position the electrode wires on the MCScap® electrode caps. Each fixator consists of two parts, separating and retaining, which are interconnected by means of grooves in the structure. To connect the parts, insert the projections of the retaining part from the side into the grooves of the separating part.