omega b mv 6 memory seats and bench retrofit

Hello I have a question again since I found different answers in the google and although with us on the scrap is an omega b limo mv6 with leather seats and memory funtkion at the driver side and though I would like to exchange my electric seats for the with memory what I know is that I need the complete seat and still need extra plus and minus clasp but where exactly? and is it an act to connect the mirrors also over the seat that you also automatically adjust and have another question would like to call the rear sit bench because the with seat heating is I only have to expand the two buttons and the seat bench are wired because all cables are already available hope you can help me thank you in advance