Fiiting LCR Splitter and Mud Flaps

[Glassy80]

What should I use to fit the LCR splitter onto my Cupra? I know I need to cut it once its on, but is there a specific tool or technique I should use when fitting the splitter and mud flaps to the car?

 

[nev]

theres a guide for the splitter somewhere, and the mudflaps just screw/bolt in

 

[Forbez]

screwdriver