This will not be plug & play.
The SM650 controls have a hazard flasher on the right switch. The GT & Interceptor have all the indicator wires running only to left switch.
I replaced my left switch for one that has a hazard flasher, and my right switch for one with Headlights on/off switch.
To accomplish this I had to make an adapter. I used four connector blocks that plugged into the factory connectors.
Basically the switches kept their plugs as did the bike, my adapter had male & female connectors for both sides so it plugs in-line between the switch plug and the bikes harness.
I had to route power to the headlight which runs to the left switch to the right switch and back.
For the SM650 switch you will need to do the same if you want the hazard switch to work.
You will need to run a connection from the right hand hazard switch to the indicator wires on the left switch.
Its not hard, but it helps if you have some experience with wiring and crimping connectors,