Fuel pressure

I just got done taking the bike apart.(going to have to fix it myself. dealer is booked a month out)
what is the easyest way to check fuel pressure.
remove line and hook up my gauge to it <
dead heading pump. is it an internal bypass type??
looks that way. with only one feed line to injectors and
one return at pump.to tank.

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" Twisted Wrist"

Fuel pump