I've noticed that most containers are loaded onto wagons from above, dry powder goods are also usually dropped into the top of the hopper. Liquids, likewise are often poured into the tanker from the top.

This causes a problem for electric trains that take power via a pantograph from overhead cables, obviously. And equally obviously the solution is to either use a diesel shunting loco to move the freight consist, or to reverse the train into the loading area so that the loco stays on the catenary, but the wagons are out from under it.

Hhowever, I was doing some research and came across this article in "Railengineer"

https://www.railengineer.co.uk/electrification-of-freight-terminals/

It looks like a cleaver idea and it would be interesting to have something similar on MBS.

Catenaries are built by @Roter Brummer, @BahnLand und @Draisine. Maybe one of them will pick up your idea.