Variants of a mold are catalogued separately, so each one has its own sets and minifigs. Check these too if something you expect is missing here.
87552pr0001Panel 1 x 2 x 2 with 'DISCONNECT CAPACITOR DRIVE BEFORE OPENING' and 'SHEILD EYES FROM LIGHT' Print [Early Version]this part is a alternate of it
87552Panel 1 x 2 x 2 [Side Supports / Hollow Studs]this part is a print of it