Need some help here guys trying get this truck home with out problems it a 94 f350 DRW turbo auto with 173,000 miles on it

I'll have fuel leak on the injector pump it at a allen bolt with plastic cap on it right on top of where all the injector lines goes i didn't want put allen wrench to yet didn't know if it some kind pump adjustment bolt. Took a pic of it so know which one talking about hoping this easy fix like


thank for any help

Bruce