More progress!

slowly coming at the end of the resto of my RD400 D…
It fired the other day… there’s still a few things to sort… new carb cables…she’s misfiring on the left, what with 28 years old plugs have to go through all the timing set-up and all.

I also need to fit the blinkers back on. All the pics I see of a D, the rear blinkers are fitted to the frame. On mine I have a threaded bar attached to the rear light base, looks factory made.
Is this this a normal setup? My frame still has original bungs where most rear blinker attach.
Plus my loom goes into the tail light housing but can’t find an earth lead for the blinkers there, I think they might need it as the housing is rubber mounted.

I tried attaching the blinkers but they wouldn’t work at all. I am suspecting my flasher relay, as It doesn’t make a noise when I swith the bike on… Am I right or do they stay silent?

Turns out it is a Euro spec modification.
I have a feeling it also uses a round cover to hide the locknut on the stem…Reason I need this pic so I can ID the right blinkers at the breaker’s yard… I obviously got the wrong ‘uns.
The front is no prob, it’s the same the world over.

Will the blinkin system work with only 2 blinkers attached or do I need all 4… as Rudiger said it is quite hard to plug them in the tube… kind of stuff you want to do only once!
EDIT: the answer is NO, of course, it will light up but not flash.