How to release aux hydraulic pressure on 2008 jd 320 skid steer

[stool]

How do I release the auxiliary hydraulic pressure on a 2008 JD 320 skid steer?

 

[Topper1]

Machine not running, key on, disengage park, actuate your hydraulics to release line pressure, and off you go.
I have seen a couple guys my way tee in a manual crossover valve between the 2 aux hydraulic circuits. They say it works, but I haven't ever had the need to do this.
I always leave my attachments in a neutral position to avoid pressured lines when I next latch onto them.