Old DOS programs and PCspeaker...

Hi all,
I have some old DOS programs that uses the PCspeaker to do the sounds and musics.
I want to know how can I connect the pc speaker cable from the ASUS motherboard directly in my Sound Blaster Pro 2 Deluxe card, in order to play the speaker sounds through an amplifier. I have a AMD K6/2 450MHz with ASUS motherboard. The SBPRO card has a little pcspk connector.
P.S. - It seems to be pretty obvious but I'm afraid because I'm not an experienced technician. And I'm posting this message here because I was unable to register a new account at the Hardware forum (I don't know what happened). Thanks For Reading.