It's over 20 years since I fitted mine and thinking about it I probably made up the hoses myself using banjo fittings. If your hoses are as per the ones on Caterham site it looks like the hoses have a fixed male end and a female end. I would suggest that the male end goes into the 3 way and the flat end of the male/male adaptor goes into the caliper using the washer. The female end of the hose then attaches to that. Hopefully when things are fully screwed in there should be enough room.