relays don’t have that dot. there are few terms in case of relays. i.e. coil pins, NO pin, NC pin, COM pin.
coil pins are used to power up the relay. usually the have a operating voltage 5V, 12V,24V etc.
NO pin is normally open pin. which mean when relay coil is not powered COM pin will not be connected to NO pin. when coil is powered NO will be connected to COM.
NC pin is normally connected pin. which mean when relay coil is not powered COM pin will be connected to NC pin. when coil is powered NC will not be connected to COM.
the pin between two pins on left side is COM pin. others two are coil pins.
on right side are NO and NC pins.