It might be a Tech Lighting T Trak system. Does it have a transformer or is it direct wired? The T Trak system is direct wired.

Dekeoboe, thanks for your suggestion. I will try to look up Tech Lighting T Trak system. I have so far not been able to find a transformer, where the home has a good number of other low voltage lighting systems (bedrooms, bathrooms) where I do find transformers . . . so the fact I haven't found one so far seems a promising fit with your thought that it may be the T Trak system.

This is a Juno Track. See the fixture below.
Good luck!

Here is a link that might be useful: Example Juno track fixture

Homepro01 and other folks who have so kindly responded--thanks for your help, the system is indeed from Juno (Flex 12 is the product name) and I have been able to locate the parts diagrams and spec sheets I was looking for. Very much appreciate your help with this!

Ledino,
Glad to help. I really love that shape fixture!!
Homepro01

Those lights are beautiful, would look great in my house! :D