can 6.5mm bullet plugs fit onto feigao xl motors?

[blueb8llz]

i need to order some bullet plugs from castle creations for my 7xl feigao and was wondering if the 6.5 would fit. i just pre ordered the mmm and i will be using the 7xl on that for the meantime. i want to use the 6.5 because im not sure what ill be doing with the mmm in the future. but if 5.5 are the max size that will fit on the 7xl, will 5.5 be good enough for the mmm running jus 4s 5000 lipos in series?