I bought PT Tools test set WB89731 for other diesel work, unfortunately it didn't come with a short 10x1 glow plug adapter so I bought a Lang Tools Tu-15-2A but it wouldn't work with the PT quick connect.
Karma aligned the stars and I realized the Lang Tool adapter is a Foster 12, the same one used in high pressure air for pre charged pneumatic air rifles etc.
The PT kit has the required QD to 1/8 NPT male so this took mere minutes to adapt. I ordered new Foster connections as they wear out when used at 3000 PSI so they are consumables. I'd rather have it fail under the hood than near or on my rifle. Hose whip at 3000 PSI is nasty. 500 PSI not so much.