Classic? Your supposed to fit it over the rubber boot, but you dont have to.
The way to do it is, difficult to explain, take gear knob off. Remove plastic gearstick/center console bit. The rubber boot is held underneath by a number of "prongs", unhook and throw it in the bin
The leather one fits much the same way, although to get it to not drop the gear stick, I folded it in on itself and used a cable tie to secure it.
That may or not make sense, so any questions feel free to ask.
Fitted pic;
Micky