1. A method for attaching a cable to a sheet, comprising:mounting a second clamp portion to a first side of a sheet, so that a second cable receiving portion protrudes through the sheet to receive the cable at a second side of the sheet opposite to the first side;
positioning the cable in the second cable receiving portion; and
positioning the first clamp portion with the first cable receiving portion over the cable so that the cable is between the first and second cable receiving portions thus sandwiching the cable and the sheet between the first and second clamp portions;
securing the first and second clamping portions to each other so that the first and second cable receiving portions co-operate to retain the cable; and
wherein the step of attaching the second clamp portion to the sheet comprises aligning at least one laterally extending bar of the second cable receiving portion with an aperture in the sheet.