To reinforce the part where the plug is inserted, I added a kind of ring. Also, I made the up layers thinner (it has to be printed upside down), to be about 0.5 mm instead of 2 (if I remember well). Anyway, this works perfectly well for me and my needs. Already a bit more than 100 hours on it. Printed with eSUN ABS+, 0.2 mm layer height.
BTW, this was printed on my Elegoo CC with the new cable just plugged in, without any holder, and it worked well !
Thank you for the original file, it saved me so much time instead of starting from scratch.
The author remixed this model.
Ring added to reinforce the place where the plug is inserted. Made the bottom layers thinner.