A bubble flare on a line will take a special banjo fitting, prob from an old brit car. They are bigger than the AN ones, cast brass. they really are an ugly thing to behold
In the pic at top, I'm guessing the threads into the valve are 3/8-24, so you need 2 3/8 to AN3 banjos and banjo bolts, and copper seal washers. If threads turn out to be 10mm, banjo bolts are available, but check thread pitch carefully. Then turn the lines out thru the tunnel and put AN3 flare nuts and sleeves on job done you will need a AN flaring tool--they are Not the same as a regular auto tool, they flare at 37 degrees instead of 45 and AN is a single flare, not double
I have an older flaring tool from Speedway Motors part # 91089528, but for light use 91089520 should do you fine
fittings from Pegasus
3265-20
3241-3/8
3242-001
3235-030 STL
3236-03 STL