Hi we have new Deutz 6185 ttv which is auto steer ready and is fitted with the 12 inch imonitor which I believe is a Topcon X 30. The only part missing is the GPS receiver. For the time being I would like to connect our Mueller receiver which came with an amatron 3 for sprayer section control. In the roof there is a XC 22 socket which I presume is for the factory fitted receiver. According to the manual the imonitor has 3 serial/rs232 connector's for connecting a third party receiver but I cannot find them. Anybody have any ideas? Thanks.