From Husqvarna on the web
They will either be in the parts book ( usually)
or
the Owners manual ( occasionally )
Generally right down the back.
Check the serial numbers as wiring changes during the production run.
Page 20 & 22 of the owners manual.
They split the diagram up for some strange reason
So print them both out and cut along the line with the plugs then join the two sides together.
A silly way to do a circuit diagram but the information is all there, you just need to know things like the pin out for a standard relay
Switches are shown with their connections so I can not see a problem following the circuits.