In ordinary practice, homyo-jiku of your parents (or any other person who died recently) should be hanged on the right hand side of an altar as you face it, and on the left hand side, so-homyo-jiku covering all homyo names of your ancestors.
平時は、仏壇の向かって右側面に、親（もしくは直近に亡くなった人の）の法名軸を掛け、向って左側面には、代々の法名を記した総法名軸を掛ける。