the mounts and transmission arms are different between vacuum and electric on the 58/9, you might find the 55-7 electric motor will fit, but otherwise the vendors sell 2 different replacement electrics, one for 58/9 that had vacuum wipers, one for those that had factory electric - the angled bracket is part of the vacuum motor ....
58/9 electric setup ....
the 5-7 version uses the same arms as the vacuum
Bill
