System and method for the electrical contacting and the mechanical fastening of printed circuit boards

System (1) for electrical contacting and the mechanical fastening of light-emitting diodes carrier printed circuit boards (2) comprising: Cutting or cutting clamping elements (4) for attachment to the underside of a light emitting diode printed circuit board carrier (2), a fixing member on the circuit board (2), a support (6) comprising a receiving chamber (15) for inserting the cutting or cutting clamping elements (4) by executing a linear plugging movement, is fixed with respect to said at least a respective lead wire (5) in the longitudinal and transverse arrangement such that mechanical wherein mounting the circuit board (2) with the support (6) by means of the board-side attachment element is substantially the same at least in each case one wire (5) in the longitudinal and transverse arrangement by at least in each case a cutting or cutting clamping element (4) in a corresponding longitudinal and transverse arrangement at the underside of the circuit board (2) is directly contacted.