Remove the wood cover and you will see a couple of small aluminium foil squares next to the pushbuttoms. That is where the lightbulbs are. This is the way I did it, buy the new ones and get a rubber hose the size of the lighbulb. Remove the aluminium foil and "hook" the old ones on with the rubber hose, twist and remove. Replace with new lighbulb and do the reverse. Takes 10 minutes max. Good luck!
Get right wattage lightbulbs.