Fuel pressure relief port

[Bigblue73]

As I'm plumbing my way to the fuel injection, I started to wonder if I had to crack the line for service something on the fuel injection unit is their a service port that I can install to bleed off the pressure and fuel? Does anyone manufacture anything like this? Am I over thinking this?

[Schwartz Performance]

http://www.riffraffdiesel.com/replacement-schrader-valve-fuel-injection-rated-1-8-npt/

Plus this
https://m.summitracing.com/parts/ear-at100200erl
(Might need the 6AN version but just an example)

Or just pull the fuel pump fuse and run the engine till it dies.