Having stripped a thread in the oh so soft solenoid block of the SLS, rather than the exorbitant price for a new one, simply got three (3) Push Fittings -1/4" is perfect 1/8" too big - and re thread the block to BSP. Of course if your push fittings are different then the thread has to match.

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The collar on the existing air lines from the wabco have to be removed / trimmed minimally due to the short length of the existing line.

A distinct advantage is being able to use a Schrader line with a push fitting on the opposite end and then easily remove the lines and pump directly into the existing lines (4mm)