2 ways
1 if the cut cable is close to machine you can buy a 2 pin, 2 piece in line connector and remake the connections
WARNING THE ONE HALF OF THE CONNECTION WITH THE PROTRUDING PINS (MUST BE FITTED TO THE APPLIANCE).to prevent electric shock
2 you can open the hedge trimmer body may have to buy some small spade connectors and remake the ends refit the new cable ends to where the old ones are
wirecutterman, June 2011