A component for use in assembling a membrane electrode assembly comprises a microporous layer supported on a transfer substrate, wherein the microporous layer comprises carbon particles and a hydrophobic polymer, and a polymer layer is present on the microporous layer. In order to improve the mobility of the fuel lines in the connections, an intermediary piece is disposed in each of the fittings between the high-pressure fuel reservoir and the fuel lines. Test cases are derived from the at least one test case scenario and used to test the software component, thereby generating test results.