Ive looked at the 3rz knowledge database and i have never seen anything in regards to keeping the battery on the passenger side.Its not a matter of room on the passenger side but getting the alternator harness to reach from the driverside to the battery on the passenger side and how to istall the charging curcuit. I know the 3rz Offroad solutions harness is designed to move the battery to the driverside. And i am keeping my factory fuse box and NOT swapping in the 3rz fuse box so i am not sure if that makes a differnce. Plus i dont have room to run dual battery's like in the picture.