First off, those aren't in the oil pan because the area between the engine and tranny doesn't have fluid in it so no worries of it being in the engine. That looks like the back of a flywheel so I would assume that you have a clutch. There probably isn't an inspection cover in the bellhousing so you're stuck to other methods. I would probably stick a magnet to the pressure plate and rotate the engine 1/3 of a turn counterclockwise and then a 1/3 clockwise to retrieve the magnet and its junk. I wouldn't go all of the way around for fear of it getting knocked off by the clutch fork.