Disclosed are apparatuses including a cable header block with apertures for floating inserts and a cover plate. The cable header block includes an aperture pattern that matches a pattern of connector terminals. The floating inserts fit in the apertures of the cable header block. The cover plate can also include a through-hole pattern that matches the aperture pattern. Also, each of the through-holes can include a first geometric shape larger than a cross-section of a cable terminal end and a second geometric shape adjacent to the first shape that is smaller than the cross-section of the cable terminal end. The cover plate retains the floating inserts within the apertures. Also, the cover plate aligns the first geometric shape over the floating inserts when the fastener is in a first position and aligns the second geometric shape over the floating inserts when the fastener is in a second position.