I've just bought a 52 plate Zafira and have a Balupunkt Milano stereo I weant to install. I've taken the Vauxhall unit and sleeve out but the wiring is quite different. The pins on the back of the Vauxhall unit are all vertical whereas some of the pins on the back of the Balupunkt are horizontal. Therefore, the unit won't push together. Am I going wrong somewhere or do I need to buy a bit of kit? It's driving me insane!!!