Hey guys, installing a LSR cast bearing carrier with tusk extended axle. The OEM carrier takes outer o-rings on the left & right side to seal out dirt. The LSR carrier comes with a groove, on just the brake side, which looks like its for a o-ring but not the sprocket side. It also did not come with any o-rings. Do I install it without the o-rings, install 1 on just the brake side with the groove, or add 1 to BOTH sides? Any help would be much appreciated, thank you.