RCA is loose

Hi I have a wonderful digital coax cable going from Lumin streamer into my Reimyo dac.  The Reimyo RCA connector is well fixed to the chasis but doesn't hold the RCA connector very well.  The other end fits into the Lumin perfectly.  I saw someone used aluminum tape to thicken the diameter of the connector.  

Any other thoughts?  I do have BNC connectors at both ends so I am thinking get an adaptor. If that is a good idea recomendations appreciated. 

Best JH

Love this stuff!