You just pull them out until they hit the stop, push it back in about 1/8in & then push the retainer through the small hole on the side of the slide & thy will then bypass the stop & come all the way out.
Sometimes a bit of ******* about is necessary. Slides can be removed from the cabinet the same way.
Or do they have the small metal clip on the end of the slides? In which case just pry the end out of the hole on the slide.
