Were there 3 versions of Condrad RDS Manager uvailable

Hi there, when hunting for Condrad RDS Manager (which is on its way now, 
thanks to a forum user, read here for more details: 
Beitrag "Re: Condrad RDS Manager (anyone has?)"

I came across 3 different versions

1: version in box (box-version.jpg, better picture here: 
Beitrag "Schaltplan CONRAD RDS Manager gesucht"
2: built-in version that has LCD backlight (light.jpg)
3: built-in version that has no LCD backlight (no_light.jpg

now apart from obvious diferences like a missing RCA jack, no light bulb 
the built-in version is a bit different as well (the box version does 
not have the left portion (where X is on box-version.jpg picture and it 
looks like you can just break that section off (it has dots)) populated 
while both of the bult-in versions have that populated

and the box version also has a lot of components that built-in version 
does not have (my software engeneering eyes only spotted the most 
obvious ones, like the RCA jack :) (but I was then confused as I didn't 
understand why the built-in version has a wire going to the section that 
you can break off, while the boxed version does not have that) but after 
some help from my friends and after reading this: 
Beitrag "Schaltplan CONRAD RDS Manager gesucht" I think that there is some 
filter section missing, now I woud like to hook this into a stereo 
output of a reciever /when reciever is in MONO of course) (it has 
de-emphasis so RDS will be realy weak after that so I think I need this 
missing components that the box version has which mine does not)

sorry for the wierd questions I think that here: 
https://www-mikrocontroller-net.translate.goog/topic/320162?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=sl
its written what is missing but I am realy confused as I have no idea 
what to buy and after that where on the device I have to solder all this 
to make my built-in version the box version

Thanks for Anwsering and Best Regards

Also if someone also can tell me what LCD does this thing use (I found 
no markings on it) it would be great as well