Apparatus and methods usable for introducing tension into a cable. The apparatus comprises a frame adapted for connection to a crane, a holder adapted for retaining a cable spool, and at least one surface adapted to contact the cable and resist its movement. The frame is adapted for disassembly into a plurality of sections. The apparatus comprises at least one bracket for connecting the frame with the crane. The bracket comprises an aperture adapted for connecting to a jib attachment of a boom head. The at least one surface comprises at least two surfaces adapted to compress the cable, thereby resisting its movement. The at least two surfaces comprise a channel extending thereon, wherein the channels are adapted to form a generally circular bore when the surfaces are joined together, wherein the bore is adapted for receiving the cable.