Started the week by moving the starter motor positive cable over to the terminal next to the battery positive, which cured the volt drop at the cable terminal.  The starter motor now engages but there is insufficient power in the batteries to turn the engine over, so replacements will be ordered next month.  I then drilled the connection box for the indicators and  ran the five-core cable up the cab door pillar to the junction box above the cab door.  The next task was to bind together with heat shrink the three large cables that go up the rearward cab door pillar, two being power cables to the lighting panel and the other being a three-conductor multicore to the indicator junction box.  I fixed them to the bulkhead alongside the cab door with hand made brass straps.   Adding the two-core wire for the flasher unit meant I was able to test the indicator circuit, with success.   A this point I decided the indicator switch was the wrong way round compared with the MW, so that needs corrected that.  Final jobs of the week were to remove the interior lights switch panel from its base and temporary reattach it to the cab bulkhead so I could lay in the wiring to the flasher unit and set the route for the multicore from the indicator junction box back to the main control box.  This required a minor alteration to the switch box base board to accommodate the cable.  I also noted an oil and paper 0.5uF capacitor on the base, not certain of it’s purpose but I will replace it with a modern one as it is leaking.  It appears to be connected across the 24v supply on the switch box.