I would bet one of them is the shift boot to transmission. That is usually one place. Others would be from either an oil plug and/or transmission gasket failing. The one on the far left would be the axle boot, probably a small weep of grease. Looking at the pic again, the one on the right could also be a axle boot to transmission as well, leaking just a little, flowing down the transmission and dropping. The old 4 speed boots do tend to have a very slight weep to them. Just how they work. Later 5 speed fixed this.