I enhanced my last Remix of the Y-Splitter with a bar with the option, to plug into Filament from the side.
You need in total now one more PTFE Connector.
I moved the Splitter a bit more to the edge to fit better for X1. I read some complaints in my Splitter Remix.
To connect just use a 18cm to 20cm long PTFE Tube and place him between the upper connector from the splitter and the end at the bar.
Its still/again based on Harald Geisler Splitter, which I liked most of all others.
If you need only a Y-Splitter which is more inner but no sideload, check my Y-Splitter.