The present invention relates to a modular cassette for coiling and holding splices
between conductors, the cassette comprising: a base module substantially occupying
a plane, the module having a conductor entry passage leading to first conductor
coiling means and first holding means for holding splices between conductors; second
conductor coiling means; and a first additional module receiving conductors, the
additional module substantially occupying the same plane as the base module and
being secured to the base module by releasable connection means. The base module
of the invention contains said second coiling means and the first additional module
of the invention contains holding means for holding connections being conductors.