Just to see how familiar you are with the slave cylinder, push rod, clutch fork set up.
When you remove the two bolts and begin to ease the slave cylinder away you need to do what James says and hold the push rod to stop it being pulled away from the clutch fork. It should be held there by a small plastic clip, you might remember fitting it. Once the slave cylinder is out of the way you should be able to see in through the exposed hole in the flywheel, past the push rod, to where it is located in the clutch fork recess. It's the end of the push rod, in the recess you need to get a bit of grease on, you'll need some grease on the end of a long screwdriver or similar.