ELTIM audio has a wide variety of RCA (Radio Corperation of America) connectors in their program. This connector type is also known as "Tulip" and "Cinch" connector and is the most common line in/output connector for audio purposes.
Some interlinks have two signal leads inside, in fact meant to connect it balanced. Those you can connect in a special, hum reducing way using RCA connectors. Read this
document where we explain how to connect it properly.
Below we made groups where the cable diameter (in mm) is the selector. Measure your cable and go to that group to find a suitable connector.