Facelift rear light confusion

Hi all, looking for some clarification on my 2002 UK spec facelift Z3.

I have a crack in my off side (drivers) tail light and I am looking to replace it with a second hand unit. What's confusing me is that my current unit has bulbs that click directly into it. Ie no bulb holder. There is a plastic trim over it in the boot which does not hold any electrics.

However I have seen pictures of facelift models with the old style bulb holders instead of attaching bulbs directly into the unit?

I have found a replacement to buy but I am worried it will not fit as the seller has told me that the bulb holder is not included. As far as I am concerned I don't think I need a bulb holder.

Can any anyone confirm this?

Thanks