Modifying a perfectly good cable based on hear-say in this forum is not a wise thing to do.
Every Scart cable from us has been made to modern LCD TV standards and is fully wired. The cable has been assembled correctly and has been Quality Tested before despatch to customer. We test on a wide range of models and use a widely used schematic.
Forums can be a good source of information sometimes but it is better to consult with your dealer before resorting to modifying the product and jumping to conclusions that there is a fault in the product.