@border here are some photos to help with the fuel lines.
First photo you can see both lines coming from the tank. The feed has the clear tube going to the lift pump, the return goes to the FIP.
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Second photo shows a closer view of the FIP from above. This is the return connection to the tank. It could be what is snapped in one of your photos, but that could also be the rear tank return connection.
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Last photo shows the connection from the injector back to the FIP. This is a hard nylon on mine, but if it ever gets a hole in it, I will replace it with the same tube as the leak off pipes. It’s cheap enough to pick up a meter at a local motor factors.
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Let me know if you need any other photos of it. We could sort something out where I could pop up and have a look at what you have, and see what’s missing/extra. I’m at the point in my shift patter where I’m working the next 4 weekends, so give me a shout if your free during the week and need a hand.