symbol on my stereo connections - simple?

[Ben j]

ok on my stereo at the back where it shows you wat on the plug does what. on the power plug u have the obvious, pic of battery, earth sign, and + sign. but what does a pic on the sun mean? and wat does a pic of a 3 armed Y or bird foot type thing mean? thanx

 

[Jones]

i'd say the sun symbol is your headlights as the faceplate may light up when you turn your headlights on.

The Y is prob an output to tell an electric aerial to raise or lower