In this photo it's the brass color fitting that the pressure line is applied.
I doubt your prv was preset to anything, they usually never are, you'll probably have to screw that bolt in a long ways before it starts making pressure. Somewhere between 16 & 20Bar (if your meter is metric) would be plenty.
Activate your whatever valve is on a switch ch so the oil is deadheading, to set your pressure & your hands will be free to make adjustments.
I was reading your programming summary, concerning your hyd pump, whether it's on a 2pos or 3pos switch on tx. Off is off & the next step of the switch you should set your EPA to atleast 30% so the pump is running while you are pushing b/c you will be constantly adjusting blade height & don't want that pump coming to a complete stop - then start again many times is a short period of time.
These larger pumps with big brushless motors do surge some amperage to initially start up, and if you are start/stop pump motor 20x (just a guess, don't know how many times it takes on avg) in a minute, you will over heat your pump esc & trigger the thermal protection shutoff, providing the esc has one. Then your pump will be dead until that cools off & allows your esc to function again.
Having your pump "mixed" with the valves, your pump will rev up to increase pressure & flow when a valve is activated.