My solution to the problem of my telescope falling off my Equatorial Platform. I have replaced the central bolt of the Orion UK Dobsonian telescope with longer one and bolted the base of the rocker box to the top of the platform. I have replaced the nut with a wing nut so that I can easily attach and detach the rocker box from its base.
From my tests today, the power connection port is CENTRE POSITIVE (12V DC) – i.e. same as the cable used for powering HEQ5/EQ6 mount or my QHY10 camera. It certainly powers up using one of the 12V power supplies for my WD MyBook USB external hard disc drives – which is what I was using in photo below.