Need fill hose help

Go online & look for a 1/4"male npt X 1/8" male npt OR look for a 1/4" X 1/8" npt bushing & a 1/8" close nipple npt. Either way should work if I understand your problem correctly. 

what is the hose thread? is it 1/8 BSPP, 1/8" NPT or is it 10mm chinese metric? is it a flare or is it flat? you will need to know that if you're going to find the right fitting.

BE VERY VERY VERY CAREFUL!!!

Yep, that should work.

Your hose is 1/8"BSP female. Your regulator is 1/4"NPT female. So the adapter you need is 1/8"BSP male to 1/4"NPT male threaded. The adapter recommended in this thread above will not seal properly to your BSP hose end. There are such specialty fitting adapters at hydraulic supply stores online but they aren't common. Your hose fitting is parallel threaded, a 1/8NPT adapter is tapered. I found this link with an adapter that you need. There may be other sites that have it but the fitting you need based upon what you posted is the 9007-02-04 fitting on this link page:

https://www.hydraulichoses.com/ProductDetails.asp?ProductCode=9007&gclid=Cj0KCQjw9b_4BRCMARIsADMUIyoLGJSD7XQuqByCsZerf4QD_i9UJT49DRz4-zM0UkOj2i7iFoVUoh0aAkn_EALw_wcB

Correct, I was in error recommending npt on both ends. That was prior to understanding the female hose end was bsp. As YO said, be careful with HPA.