It takes ages to find these parts and then sometimes they aren’t correct. That’s part of the problem when you find parts separately.
I think one of these is an AK72A for 1909-14 and the other is probably a DK68 for 1915 only.
They fit under the gas tank to the BK419 gas pipe. I could adapt the wrong one but as soon as I do I’ll probably find another one. They might even be variants of the same part!