Help with washer and fitting

Need a little help guys and girls.

Just setting up my trailer and have brought a link hose and a reel from Ben and Rutland pumps. He send me a few washer an a couple different ends.

Shall I use the washers if so on which fittings? Also what is the different between thr

View attachment 6069

View attachment 6070

looks like the washer is a dowty washer Bonded Dowty Washer Seal

m22 quick coupler x 3/8 M22 Quick Coupler x 3/8 Female Thread

cant help on the other one cant see it on his site. i would say slide the dowty washer over the 3/8 hose and the connect the coupling which will make it fit a standard 22 thread which must be on the reel? ( but im no expert and that might be completely the wrong information )

All sorted now. Thanks. Hate leaks