TOSLINK (Toshiba Link) is a standard fiber optic connection created by Toshiba 1983, which is based on the use of optical signals instead of electrical signals. It is generally used for interconnecting audio equipment, but supports different formats, both physical and data. 1 (in the image) Toslink Connector 2 (pictured) Connector Mini Toslink

The RCA (Radio Corporation of America) connector is a connector used to send video signals or audio.
This is a circular two-contact connector; signal and ground, used with coaxial cables. Each signal uses a single cable and to differentiate color coded RCA connector on the set.
(1) Analog Audio:
Audio Left (White)
Audio Right (Red)

(2) Videoanalogical:
Video (Yellow)

(3) Composite Video:
Audio Left (White)
Audio Right (Red)
Video (Yellow)

(4) Video Component (YPbPr):
Y (Green)
Pb (Blue)
Pr (Red)

(5) Video components (RGB):
R (Red)
G (Green)
B (Blue)

(6) Digital Audio:
S/PDIF (Orange/Gold)