un manque sur les union DP2

salut, juste une interogation au passage, j'ai remarqué que la tête de dragon Y , Tank de métal Z et catapulte à vent W en DP2 ne précisé pas avec quelle carte les unir.
Pour la catapulte à vent W vue que j'en est une en EEN, j'ai vue que c'est avec et seulement avec le tigre jet V que l'on peut l'unir, mais quand est-il des autre?

Z-Metal Tank
(Magician's Force, Dark Revelation vol.1)
Once per turn, during your Main Phase, if you control this card on the field, you can equip it to your "X-Head Cannon" or "Y-Dragon Head" as an Equip Card, OR unequip the Union equipment and Special Summon this card in face-up Attack Position. While equipped to a monster by this card's effect, increase the ATK/DEF of the equipped monster by 600 points. (1 monster can only be equipped with 1 Union Monster at a time. If the equipped monster is destroyed as a result of battle, destroy this card instead.)

Y-Dragon Head
(Magician's Force, Dark Revelation vol.1)
Once per turn, during your Main Phase, if you control this card on the field, you can equip it to your "X-Head Cannon" as an Equip Card, OR unequip the Union equipment and Special Summon this card in face-up Attack Position. While equipped to a monster by this card's effect, increase the ATK/DEF of the equipped monster by 400 points. (1 monster can only be equipped with 1 Union Monster at a time. If the equipped monster is destroyed as a result of battle, destroy this card instead.)

Ceci est le texte correct corrige .
Source: http://www.upperdeckentertainment.com/yugioh/en/faq_errata_01.aspx