Replace rear lights

Hello dear community, after almost 19 years our Volvo was of the opinion that he needs new rear lights. They are not yet faded, but my dad broke them when ranking with the WoWa, where the bikes were on it. The left, lower part now has a hole, which was provisionally glued with tape. Now Paps ordered new lamp parts. Are from Depo and Made in Taiwan. The original ones were still from France. I looked at them briefly: there are some Your numbers on it, including an E4 in a circle. I hope they are allowed. Because the things were ordered, where I wasn’t there and was then totally surprised yesterday to hold new and really nice shiny tail lights in the hand. My question now: does anyone have instructions here that I can replace the ones tomorrow? At the moment unfortunately only the lower parts are available. The upper ones are still the old ones. Looks then slightly modest, but well. Do I have to be more or less water-resistant, Tim PS: does someone have an address for new, top rear light parts? Should be for the 850s, though. The V70s don’t get me there. Unfortunately, I insist on originality.