ᐅ Cable Entry for Basement Hollow Core Concrete Block

Hello everyone!

For a wall box, power, lighting, and outdoor network connections, I need to run several cables through the basement wall. I am still in the planning phase.
Based on my research, the most practical method seems to be using a sealing ring.
The basement wall is made of hollow concrete blocks. Therefore, it makes sense to install a sleeve pipe.
The sealing ring is DN100. The sleeve pipes also have a certain thickness. For example, Hauff has a DN100 sleeve with an outer diameter of 160mm (6.3 inches). The wall thickness is about 50cm (20 inches).

1. Do I need to create a slope to the outside? Maybe 1-2%?
2. With a sleeve outer diameter of 160mm (6.3 inches), I will probably need a 200mm (8 inches) hole. Is that roughly correct?
3. What should I use to seal the gap? Swelling mortar?
4. How do I get the swelling mortar into the wall? There are filling devices available, but those don’t make sense for just 1-2 holes. What else can I do? DIY? Or are there systems that include a filling device?
5. I would like to run the network cables inside conduit pipes. For that, I probably need a “cable-compatible” conduit. Do you have any recommendations or advice?

Thanks in advance!
Best regards, Christoph