An extensive survey of different types of radio-frequency connectors that can be used on FMC mezzanines has been made and is available in the Files area. The major criterium was the height of the connector that is limited by the FMC standard to 9.5 mm only (on 10mm spaced FMCs). For the 100 Megasample per second ADC an SMC-type connector will be used for its robustness and small size.