Bringing a BC455 back to life - Part 4

This is the fourth of several short videos I plan to make as I restore an ARC-5 command receiver (BC455) All the capacitors have been changed. I will keep the old units as I may want to use them in a future restoration. The replacement capacitor mounts are ok except for C16 (ABC) but it wasn't worth making a whole new PCB just for this and the 3uF at the front of the unit. Now I have the power and heaters working off the front panel so I need to sort the HT and fit the DC dc converter. I had to re-check the dynamotor connections but I have them correct. I can't work out why the previous owner reversed the LT connection? I know he was running it from an external supply so any suggestions are welcome. VY 73 Rex G8UBJ