i can't even tell you. i could never find out what they used to mount them to the fenders. you can't put them very high though because the handlebars will hit them.
then you will have a half blue half black bike. i wouldn't. his are crakced like the hole thing. personally i wouldn't put then in the fender. you have to put then on the very edge so the handlebars don't hit them. which i sbad because if you get slightly tipped in the water they go under.