Red block is the focus control, basically a very high value pot rated for operation at 30kV. If only 2 leads then it was Sony, as they integrated half the pot in the CRT itself and the pot only had to handle the focus voltage itself. 2kV as opposed to 30, though the wiring to the HV end had 30kV isolation in case of flash over. 2 controls and it is a combined focus and G1 control, which controls both focus and the maximum brightness of the tube by setting the A2 final acceleration voltage on the CRT gun assembly.
Big long red tube would be a high voltage diode, with a LOPT that is not split, but which has multiple layers of insulation at the high voltage end and a single lead out of the middle of the big block of resin or wax on the one side leading direct to the diode, the thin wire because it was short and held both ends, and the thick EHT cable to the Focus,G1 controls in a splitter block and then the final anode on the CRT side. Only used on older smaller CRT units, as it could not provide the power required to operate a CRT bigger than about 10 inches. Large screens used a diode split LOPT, where the HV winding was split into many small ( 2kV or so ) sections all in series, with diodes inside the body so the insulation for each section was not stressed and the capacitance of each section to the core provided a reservoir capacitor instead of having to be charged and discharged at line rate. Might only be 200pF total, but at 30kV and 15kHz a fair current to dissipate in the windings.