Okay so I picked up a kinetik hc1800 and am having trouble installing it. I was hopeing to just drop it in the oem spot but either the polarity is backwards or the posts are on the wrong side. The factory cable will not reach the posts.

How do I fix this the correct way? Or where could I take this to have fixed?

 

The terminals are reversed on the HC1800 compared to the OEM battery.

You could make your own battery and ground wires for the battery, or make an extender or sorts.
I recommend making your own wires.