Nitrous Oxide - Bottle mount question (flat mount)

I have the NXL kit with a 15lb bottle in the trunk of my vert. The installer used the NX quick release brackets, except the bottle lays COMPLETLY flat in
my trunk. I used to have the NOS dry kit, and the bottle brackets were installed so the bottle was angled upwards. How will this flat mount position affect that siphon tube? Is it in a fixed direction inside the NX bottle or should I try to find some new quick release angled bottle brackets.

You should have at least a 10 degree angle to the bottle regardless of the brand. You should also verify the siphon tube orientation by removing the valve (after completely emptying it) and adjusting it if needed.