Those don't sound like original 140 relays to me. If I remember correctly, there should be a rectangular silver one (approximately 2 1/2" x 1 1/2" x 1 1/4") for the headlight high/low beam, and one or two round silver cans, for the horn and OD (if equipped)

I am guessing what you have are either Bosch or aftermarket replacements---each is a slightly larger than 1" cube, black or gray, with four or five terminals on the bottom and a mounting tab on the back edge of the top. These are commonly used for fog lights, but there is no reason you can't use them for just about anything---all you have to do is figure out how to wire them up appropriately. If they are Bosch, they will likely have a diagram on one side that shows what each terminal is connected to inside.