Lucky you, I actually have my old Corolla flasher here with me still (junked the car with the LED flasher installed still lol).
It is a 3-pin flasher, so the pins are in a triangle shape. The pins are marked L on top, E on the left, and B on the right. Normally, the E and B are switched on the LED relays, so you actually have to reverse the polarity.
You can use this relay, and if you go down the page, you'll see the diagram where it shows to reverse the polarity
I did this by adding my own extension wires to the pins and just inserting them manually so that the flasher just hung up there.
On my first LED relay, I was actually able to take it apart and resolder the insides so that it plugged in.
The flasher relay is located up under the dash, accessed from the driver's kick panel. Go under there and look up, way up... have the flashers on so you can find the source of the clicking.