New HU connection cable. Confused....

[EvansJD2112]

Just received the kit I need to replace the HU in my '09 Zed

 

The cable I've received from Incartec has 4 phono plugs, but my Alpine IDA-X100 has 6 in total; 2x for front, rear and sub.

 

Am I missing something?

Dropped a mail to Incartec, but wondered if anyone else knows what I need to do

 

Thanks

[EvansJD2112]

Perhaps I should have searched better..

http://www.350z-uk.com/topic/54772-new-head-unit-but-no-volume-sorted/page__hl__phono#entry813117

 

says

Red & White RCAs are front L&R Black & Yellow are rear L&R

 

was expecting a separate output to the sub