Check your suspension.
The "one shot" has small pipes feeding to the top of the kingpins. The pipes are similar in size to brakepipes. If you have a grease nipple there instead then either you don't have the system
or
A previous owner has converted away from the one-shot.
The foot operated "button" is like the old headlight dip switch that used to be mounted on cars years ago. It will be reasonably high up behind(ish) and to left of the clutch pedal to make it less likely to be pushed accidentally whilst driving!
