oil pressure sensor 94 Jeep GrandCh 5.2l 4x4

[dinkydaudoc]

Does anyone know how to get to the oil pressure sensor(switch)? I have the schematic which shows it at the rear of the engine next to the distributor, but when I look , I can barely see anything , let alone get your hand or socket around it to take it out. I also looked from the bottom but it is totally obscured. Anyone care to offer how this area is reached, are there any pearls as to how you get there from the top?