Sorry for the late reply.
I can't get your pic to load on here so I downloaded it and that works.
But I don't see a way of getting to that plug w/o moving the compressor. However, I don't think I've seen that way of mounting a compressor so am guessing that you have a dealer-installed system.
And, what's with that primer bulb? Is it in the fuel line? If so, why are there two lines?
Gary, AKA "Gary fellow":
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Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI