iPilot is a stand alone TM system ...

iLink connects the Minn Kota to the HB head unit for certain features that can be controlled from the HB head unit ...
Tips 'N Tricks 64: MinnKota iPilot Link...Follow the Contour - YouTube

Here is the list of HB units compatible with iLink ...
http://www.minnkotamotors.com/WorkAr...t.aspx?id=1490

It would be beneficial for your bow unit to have its xducer on the TM so that the sonar images you are seeing are not from the transom 20ft behind you ...

Rickie