So the kit you have is supposed to replace the air temp gauge in the fairing. Should be the lower left gauge. The harness you are looking at....one end goes to the sender that you installed for the oil temp and the other end will plug into the air temp sensor harness that you will disconnect from the sensor as you are no longer using it. The air temp sensor is on the underside of the fairing by the upper area of the left fork. Just to reiterate, unplug the air temp sensor plug and plug it into the oil temp harness end in your picture. That should put you in business.
I have no definite answer for your fork legs, but if I recall correctly they should be the same.
2019 Silver Flux/Black Fuse FLTRU