Exodus 39:4

39:4 They made shoulder pieces for it, attached to two of its corners, so it could be joined together.

Exodus 28:7

28:7 It is to have two shoulder pieces attached to two of its corners, so it can be joined together. ¹ 

[28:7]  ¹ tn Here the Pual perfect with the vav (ו) consecutive provides the purpose clause (equal to a final imperfect); the form follows the use of the active participle, “attached” or more Heb “joining.”