If you take out the bottom drawer by sqeezing both sides to enable the door to drop fully down, the drawer can be removed by pulling outwards. You will then be able to locate screws holding the trim together with the centre consol, the same on the drivers side. There are two push in locator plugs one per side that need to be prized out use a plastic trim tool if pos you should now be able to pull the consol out the button normally lands on carpet?.I have found the best way to assemble the shift lock is to remove the panel that has the gear selector from the main panel, this can be done by carefully prizing 4 clips and carefully removing take your time so not to break tabs. Refit the main consol without the the shift lock panel then with the lock button in place snap the back. In place. The best advice I can give is take your time!!
Hope this is of help
Mike