should be a loom connector inside under the radio. i wouldn't advise you connect straight to the battery unless you put an inline fuse. if the corsa does have a loom fitted it will only be 2 wires with a push in plug. a fuse may have to be put in the fuse box ( check the cover it will say what fuse required and in which position to put it. ) mine is 20amp.
bob. p.
May 2009
Pretty Easy I THINK, as I have just got a merit version corsa and is going to try same thing!! fingers cross it works! lol
All u do is feed the red and black wire to battery am guessing
Gary
May 2008
George if you recieved any info on this matter please pass to kupso@hotmail.com if you don't mind. I have the same problem. Why don't they come fitted???