Testing fuel pressure

[King2]

Hi, I just received a fuel pressure test kit from ebay. Description of this tester reads for petrol/diesel.
In the instruction pamphlet it says not for diesels. It's a 100psi gauge
Can I use this to test pressure from Lp/Hp delphi pump. If so where to connect gauge?. I've searched everywhere on the net to find out if my Megane 2 -1.5dci 2006 has a valve (schrader) to test fuel pressure. No one seems to know. Please help. My car hasn't started in 6 months.