How do you attach hair trimmer on Phillips norelco cool skin electric razor?

Here are instructions from the Philips website. Please see related links at the bottom of the answer To Groom Sideburns and Moustache: Switch the razor off. Clean the razor and razor head assembly by running under hot water before installing Trimmer. Press the Razor Head Release Button located on front side of razor, directly under the shaving heads to remove head assembly from razor. Remove razor head assembly from razor. Tilt the Trimmer Slightly backwards. Fit the Trimmer onto the razor (you will hear a click).The Trimmer is now ready for use. Activate the Trimmer by pressing the on/off button once.