1963 buick convertible top motor refill?

Answer 1

If it's the same set up as my 63 Pontiac look in the trunk area under the convertible top.  the motor is there and all you need to do is unscrew the filler cap and top it off.  Look for leaks in the lines as to why it is low on fluid.  I believe it just takes regular brake fluid to replace.  Good Luck