Code P018B, low side fuel pressure sensor location needed

I have the vehicle listed above that is idling rough and sometimes stalling when it is in idle. I had the car scanned and it threw a P018B code. Apparently the code is for the low side fuel pressure sensor, which is easy enough to replace (usually).

However, I am having some trouble simply locating the sensor. I know where the high side fuel pressure sensor is, but I haven't been able to find any diagrams or information on locating the low side sensor.

Does anyone here have any insight as to where it might be located?