Why does my new case have 2 H.D.D. leads?

From my front panel wiring I have a:

Red & Black wired (connected) connector labeled H.D.D. LED (no polarity marks)

and an Orange (+) & White (-) (connected) connector labeled H.D.D. LED

but only one space on my MB for H.D.D. LED connection.

What's up with this guys?

Some people have a RAID card which also have a HDD light header. (For example my Promise IDE card have one)

If you don't need it then there is no need to plug it in :)

Thanx!