1968 winter liner? For Jehlicí "Kongo" jacket?

I have this 1968 liner which came with a 1966 Jehlicí "Kongo" jacket http://camouniforms.net/index.php/eastern-europe/czechoslovakia/vz-60-jehlici/army/1520-2016-09-02-17-59-18 , however the 1966 jacket does not have any compatibility for a button-in liner. Do later Kongo jackets have the ability to button in a liner? If you have a 1970s or 80s Kongo could you pls check?

Otherwise anyone know what sort of jacket this liner belongs to?

More Army Jehlicí:
http://camouniforms.net/index.php/eastern-europe/czechoslovakia/vz-60-jehlici/army

Ministry of Interior Jehlicí:
http://camouniforms.net/index.php/eastern-europe/czechoslovakia/vz-60-jehlici/ministry-of-the-interior

Sorry for late reply.

I made quick research on google. The liner is designed for both vz. 60 kongo and also vz. 70 dress uniform trench coat.

I also found out that it was worn unattached under the earlier kongos. Probably the latter ones were compatible with buttons. I can´t check it now, during weekend I should have one kongo in my hands, however I don´t know if it is old or new version.