I have a Sigma alarm fitted in my m/van.I live in Jersey and before Xmas took the m/van to a local auto electrician because I had a fault,which was diagnosed to faulty contact blocks.I have the new blocks but an unsure as how to fit them re the wiring.Does it matter which colour wires go where?Unfortunatelly my auto electrician is away until May,and I have loose wires to part of the system. Thank You, J.E.Rowley