Described herein are methods, compositions and kits related to manipulating hematopoietic stem cells and more particularly to methods, compositions and kits related to increasing the number of hematopoietic stem cells in vitro, ex vivo andor in vivo. A clamp, for clamping the lead frame during wire bonding, includes an observation hole. A child seat mounting plate is connected to the seat back such that the mounting plate and child seat extend into the storage compartment in the upright position of the seat back, and such that the child seat is in a seating position in the collapsed position of the seat back. The connector further comprises a spring arrangement coupled to the shielding arrangement for resiliently urging the shielding of the cable against the annular surface of the shielding arrangement to thereby provide a reliable electrical connection between the cable and the shielding arrangement.