5 Speed Auto Gearbox

[350gt premium]

Hi All,

I have a November 2004 V35 coupe with 5 speed auto tiptronic gearbox, I bought an auto gearbox from a March 2004 V35 the gearbox is exactly the same apart from the wiring the box I have only has one wire coming out however the other box has 3 different wires...Is it possible just to get the wires fropm my box attach it to the appropriate section on the gearbox and install it? Has anyone done this before??

Thanks.