Electrovibe Photocell Positioning/Height/Angle Relative to Bulb

I'm building an Electrovibe and am unsure as to how the photocells are supposed to be positioned around the bulb. I've found a few photos online but want to make sure I do it correctly.

I have 7532 photocells (https://smallbear-electronics.mybigcommerce.com/photocell-silonex-advanced-photonix-nsl-7532/) and the bulb is a 7371 VCC (https://www.mouser.com/ProductDetail/VCC/7371?qs=N8%2Bk0S5zvCYBBpiHgR%2B78A==).

I've seen a couple build photos online with the photocells set completely flat against the PCB, others with the face of the photocells bent 90 degrees and facing the bulb, and others with the photocells bent/facing the bulb and positioned as close as possible to the bulb.

Assuming they are supposed to be bent and facing the bulb, do I align the height of them to be level with the actual 7371 bulb itself?

Here a few photos I've found online for reference (if any of these are accurate please let me know as the visual helps a lot):

1
2
3
4

Thanks!

Edit: Also does the 7371 bulb have lead polarity? Or can it be soldered in either way?
 
Ideally, you want the same amount of light hitting the entire surface of each LDR. #2 will do that the best. For #1 to work well, you should have a diffuse reflective cover over the bulb & LDRs. White plastic or cardboard is good.
 
Glad I found this post. I just started putting the Electrovibe together and soldered the LDRs flat against the PCB. From what I'm reading here, doesn't seem worth the hassle of pulling them off and resoldering? It's a bare metal enclosure so shiny inside.
 
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