Here is a link to the Insight manual.  Someone did not try very hard if they told you there was no manual.

I have a Trimble autopilot on an MT765.  I am currently using the Trimble FMD display.  The systems works and it works well.  It acquires the line very quickly.  I am considering changing to the AgLeader InSight because the InSight has more logging and control capabilities.  Trimble keeps promising logging but it still has not appeared.