Factory Stereo security code

[carlhoffmann]

Hi , im just wondering how id go about finding the security code for my 1993 Subaru SVX .

Also i *think i have the code , im not sure , but how do you input it , like is there any combination of buttons you have to press ?

ive tried using the search feature but cant find any information about this , if anyone can point me in the right direction that would be helpful.