This is the eMylo I used - - I think; the webpage does not list the part number, but I physically verified #R122A on the (my) label before posting earlier. …It certainly looks the same and please see page 6 of the (English Language) manual for how I connected it.
I did not confirm the part number on the HY and I am away from my shop for a few days, but I think this is it.
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Almost forgot, the eMylo does need a 12VDC power supply, but only ~0.5A IIRC. If you don’t have one handy (from an old phone, or IT switch, etc.), then this one works just fine.