Engine conversion Corsa C12NZ to C14SE

Hello since I have already gone through all search engines but still found nothing suitable now my questions! And I bought today an Astra F with C14SE as a butcher and wants to install the engine in my Corsa because my C12NZ will soon make the Muck! Installing the engine makes me no trouble, much more thought I make the thing to wire so that it works! Do I have to take the motor cable tree out of the Astra and where do I have to connect the thing? Do I have to change anything else about cable technology? I’m loaning electrical engineering at Opel but you want to learn about it and it can’t be that hard! I would be happy about helpful answers. mfg der Robert