help with dodge d150

how s everyone doing i have a problem i have a 1990 d 150 pickup the wiper rod that connects the 2 toghter with the motor has came off the
only problem i have is the wiper does not pull all the way back i need some help on how do i get them off some one said a pin but i cant get them to stand str8 up to get to the pin thanks for all the help chris
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