There needs to be room to put the new ballast in the headlight or enough cable to put it outside or make hole with a grommet in the case to run the short cable to ballast.
So on s/V60 the existing Xenon Ballast is mounted under headlight case.
You need to buy whole kit for led install.
If you have Xenon have you bought quality Xenon globes to try?
I got "nearer to daylight" leds to try and difference was negligible. I took them out. I stuck the ballast inside as I was doing a trial. I'm putting in better Xenon globes instead......
If you can figure out like what I had to do per above, give it a try yourself otherwise ask an auto store to do it. They charge way more than online for the set and you pay install cost. New Xenon from STEDI and diy ...easi.....