At first I had the ballast 3m double sided taped to the wall beside the stock air box, but it was causing tension on the relay wire. Idk how, it was fine for a long time, I guess it was just enough pressure to slowly tug at it enough over time to start ripping it. I honestly don't know how it took so long if the pressure was that bad. It didn't even seem that tight. I think it was because i had a SRI when i first mounted it, but then i put my stock airbox back in, so maybe that cause it to push the wire over causing more tension.
After that though, i tried to cram it in the crevice under the headlight, and it stayed for a while (i don't want to 3m tape something that i'm unsure if i will have to replace it or not within the next few days), then it fell somehow again, now i have it ziptied kind of between the battery and the headlight. You can barely see it if you look in there. It hasn't given me any trouble lately though.