Performed a test of the ESD cabling associated with the BSC8 cartridge. A time domain reflectometer was used to verify the integrity of the coaxial cable from the vacuum side connector down the suspension chain leading finally to the reaction mass ESD actuator. Discovered that 3 out of the 5 coaxial paths were bad. Cause traced to a failure of the solder joints used to attach the coaxial cable to the PEEK custom connector. The joints were baked at 200 degrees C in the vacuum bake process. The solder used has a melting temperature of 184 degrees C, which resulted in a complete failure of these connections. Even the two that tested good rapidly failed when tension was applied to the connections. After a conversation with John Worden and Mike Landry, we elected to leave the majority of the cabling intact and to re-terminate the coaxial cables in a new connector after the cartridge is installed. The 5 coaxial cables will be drawn through the aperture of the conflat feedthrough and a new connector will be installed in situ. All of the five cables appear intact and correct aside from the failure of the vacuum side conflat mate.