Note the aluminum plate at the top of the photo. The pylons leading to the engines will be attached to this plate.
While the manufacturer had already drilled holes for the pylon attachment into the ship, he forgot to add extra holes for the cables in that aluminum plate.

I was concerned about the aluminum plate breaking away while drilling extra holes into it from the outside, but the plate was very well laminated into place and I did not run into any problems.

I later removed the brass tube in the foreground and replaced it with a wider aluminum tube.