MWR 630cc injector wiring

[spynish]

Hi,
 
I'm installing MWR 630cc injectors and need to know how to wire them. I have read that positive car wire is the one that is black and red. Is this correct?
 
Also, can anyone confirm that MWR 630cc injectors: http://store.monkeywrenchracing.com/product_info.php?cPath=43_72_165&products_id=805
 
Have same polarity than this one?
 
 
 

 
Thanks in advance!