VW Passat TDI: 96kW, 2WD, Webasto Heater

Hello everyone!
'I'm getting my SH (auxiliary heater) from Webasto tomorrow. It's a Tele Thermo Top C+ with all the installation accessories. My question is about the exhaust pipe that goes into the tank fitting. Does anyone know what it looks like specifically, and whether it's easy to drill the hole as described in the instructions? How do you disassemble the fitting (on a 2WD model, which has it in the floor of the trunk)? It's hard to see from the installation pictures. Do you have to remove the entire pump, or is it enough to just remove the cover with the hoses? I believe the exhaust pipe is rigid, right? Won't that be somewhat in the way when you reinstall the cover?'

Please provide information.

Thank you.

Greetings.