An electrical insulation displacement connector includes a bare single-wire contact element having a first end defined by opposed blades that define a receipt aperture for an insulated wire, and a second end configured for direct electrical contact at a contact position on a printed circuit board. Retaining structure is defined on the blades. A cap is configured for fitting over the exposed bare blades. The cap includes side walls and end walls with a slot defined in each of the end walls that align with the blade aperture. The side walls are engaged by the retaining structure upon pressing the cap onto the blades. The slots in the end walls of the cap have a width and height such that upon fully pressing the cap onto the blades, the slots engage and longitudinally align the insulated wire into the blade aperture so that the blades pierce and make electrical contact with a core in the insulated wire.