Well, you didn't say what model infinity you have but this shouldn't be much of a challenge.
It won't be hidden in any external storage compartment.
It won't be in the bathroom.
It will be just above floor level.
It may be in/near the dinette seat boxes.
It is probably in the bed pedestal.
When I say "in" - the power center is inside the box but the breaker/fuse access panel is facing outside and visible.