Here’s a pinout link: http://pinoutsguide.com/Home/wd_tv_tvout_cable_pinout.shtml
(ignore the “Alternative Component pinout”)
As a test i found a Standard Component to 3.5mm cable (On the LEFT)
Checked with a multi meter:
1 = RED
2 = BLUE
3 = GREEN
4 = GROUND
Compared to the WDTV Component to 3.5mm cable (On the RIGHT)
it measures:
1 = GREEN
2 = BLUE
3 = RED
4 = GROUND
So, since they are reversed… i hooked up my old WDTV Live to the TV using the Standard Cable (non-wd)
RED into GREEN input on the TV
BLUE into BLUE input on the TV
GREEN into RED input on the TV
Worked fine 
I don’t have a Standard 3.5mm to Composite cable to test … but i’ll bet the pinouts are also reversed…
WD
1 = YELLOW
2 = WHITE
3 = RED
4 = GROUND
STANDARD
1 = RED
2 = WHITE
3 = YELLOW
4 = GROUND
So a Standard cable would be hooked up like this
RED into YELLOW input on the TV
WHITE into WHITE input on the TV
YELLOW into RED input on the TV
