Klickfix replacement part

This piece was part of an electric wheelchair to hold the batteries in place. The exact type of mechanism can also be found on bicycle attachments etc. but is not sold separately.

I designed it in Inventor and made the region where it broke a bit thicker to reinforce it and prevent it from braking again. 

It is printed in PETG but PA is also an option. My choice for now was PETG due to the low friction coefficient and the lower price. PA would be stronger if needed. 

I would suggest using at least 4 perimeters and 30% infill so that there are no weak spots.