Hi

can I use the spare connection on the (+) terminal to connect my power wire for the amp? Is this connection fused?

Pic for better understanding:

spare connection #4

Is #4 fused, and can I connect my amp to this terminal?

 

Personally I would put it on 1.2.or 3 I think 4 is fused and if it is fused too low then your shooting yourself in the foot. Closer to the battery is usally better when going with Audio since when your hitting low notes it can draw a LOT of power and #3 might not like that.

 

The little window on top of the connector says 120A, but i don't know if it's ment for #4!
I'll have to check that out, does nobody else can tell me something about #4

 

I looked at that one for a long time...but decided (because it is fused) not to push anything and just put it on 2.

It may infact be 120, but what happens when you blow that fuse? you are going to be out of luck cause you know Nissan Europe doesnt have that fuse in stock anywhere.