Installing Marklin Interior lights part 1

How to open a Marklin H0-Scale passenger car, and install current conducting couplers, in this case the 72021 couplers. All parts shown are available to order on our website ajckids.com
ajckids.com/products/marklin-...
The Marklin 72020 couplers are very similar in installation, but have different wire attachments to connect to your interior lights.
ajckids.com/products/marklin-...
Part 2 is here:
• Installing Marklin Int...

[@janmogensen2619]

Really helpful - thank you!