relay board cover on a 914-6 Options

[Gustl]

this question is from a friend from Germany:

there are different relay board covers, but which one is correct for an original 914-6



my very late MY'70 914-6 has the "square" style cover:



same here at a MY'71 914-6:




we know from at least two early MY'70 914-6 that have the sloping version installed

so, which one is correct - or, when did they change the relay board cover?

(IMG:style_emoticons/default/beerchug.gif) Gustl

[porbmw]

Alright...
Line from the old gramps in "Moonstruck"...."I am SOOO confused!" (IMG:style_emoticons/default/sad.gif)

I understand the earliest cars may not have had covers....and that perhaps towards the end of MY70 the factory started installing the squared off cover.

If so...I'm assuming they used the threaded rod to affix the cover...
AND
If so, then what is the item sold by AA, the twofer that is akin to 2 different sized rubber bands, one for the battery cover, and the other for the relay board.

Which leads me to my next 3 questions:
a)if the earliest cars didn't have the threaded rod, is that why Porsche then used a rubber band for a while.....assuming that is what it is for

b)how best does one retrofit the early cars to use the cover....AND (not to hijack this thread, but it may have already just about run its' course..) (IMG:style_emoticons/default/sad.gif)

c)slightly off topic....what's the scoop re the battery covers. Somewhere in this site there is brief discussion on battery covers, can't find it, and it didn't answer my questions. I gather the earliest cars didn't have a cover...and Porsche then came up with one, or two versions. I see advertised the cover that is basically a perforated plate...have never figured out how it attaches to the battery...is the "AA rubber band" the factory solution to that?...and....did Porsche have more than one version of battery cover.

Yikes