ThanksClick on the spanner. Then implement. Then "master switch". Up the top it will show "master switch virtual" . Click on that and it will give the option of external console input. I'm not sure how you can configure this in a magnum. But with a massey through the c1000 screen you can assign different functions to switches ie press the headland button and it will go through a series of whatever you want. I did this for my drill and it worked the first time , but never been able to get it to paint automatically since.(and before any bright spark chimes in, yes, the 12v / headland switch down near the power plug console was in the right position).