Casio CZ/ VZ/ FZ - Pro Series

I was hoping to find out where the internal battery for the memory is 
located on the casio CZ-1. Probably same as CZ-5000 if anyone knows the 
location on it. Also, to anyone interested. I bought a CZ-1 of ebay at 
a good price that needed some "cleaning" because of age/dust as told by 
seller. Turns out when I take it apart to clean up the inside the main 
board holding all the buttons on the right side (not the preset buttons)
it appeared that someone had spilled a soda all over it(not simple 
cleaning anymore). I desoldered off one of the tactile switches
(buttons) and replaced it with a LKG industries Philmore NO. 30-14416 
tactile switch and now the function works perfectly. So anyone who 
wants some fresh buttons if yours are sticking or you have to push them 
a couple times, or if you just want that fresh clicking sound when you 
push them. They can easily be replaced with this part number or 
anything to the same specs.
thanks,
-michael-