Sorry misread the post... Macdrone was explaining how to take the "cage" off the battery holder... sorry

And those caps ALL look original to me.... do the rock back and forth and remove the old caps.. You will then need a soldering iron to remove the left over legs from the solder pads of the old caps.. Then clean the board with some rubbing alcohol (91%) from the pharmacy... I use a toothbrush to get in the small areas and scrub it out of the legs of chips... but I soak it down with the alcohol, scrub with tooth brush and do a final alcohol wash.. and then put in front of a blowing small heater.. (not too close) and let it dry it off for a bit.. the alcohol will evaporate... Usually I will shake the board in the tub to get the majority of the alcohol off first... It's good to wash the board down and get all the residue off..