How to fade out batch wav files?

I need to apply a fade out of 2 seconds on a batch of wav files (with names including spaces like C 0 120-127.wav). The files length varies, but I need a fade out of 2 seconds from the end of each file, regardless of the file length. I know this can be done with sox, but the tutorials I checked include other actions (fade in or convert) or are for single files where you specify input and putput, and this is confusing (I'm a sox newbie). I need the files names to remain the same, although piping the output to another folder is also acceptable. Thanks.