There is disclosed a glazing component connector comprising a first part and a second part, the first part comprising a head for reception by a complementary channel, from which head extends a shank for enabling connection to another glazing component, and a locking clip for locating about the head thereby to secure the first part to the channel. Furthermore a rigid-flex printed circuit board or sub-assembly thereof is provided. The cover has a lower surface provided with a series of spaced apart, parallel downwardly facing grooves adapted to receive a concrete float connected to a concrete float adjusting device.