Common Interface on TV

what is the common interface slot for on my tv   Dan what is a 3 slot graphics card

Composite video: An older video connection that's still found on current smart TVs, and can be identified by a yellow RCA connection, or

sometimes called CAM It is a means for accessing some subscription services in SCAM1A COMMON INTERFACE Reduction for CI module of Samsung TV THIS IS MY OLD TV SAMSUNG HD READY de-enSamsung-32-82

rc77 slot I'm trying to connect a CI+ module and smart card to my TV it worked for few seconds (I could see the additional  Checklist · the TV software is up-to-date · the CAM module is updated to its latest firmware version · the contacts of the CAM module are clean · the CAM slot