I can't remember where that splice was but it should be close to the fuse. I thought you already identified it.

Where about seven wires are crimped together, two of which go to EGS, four to the O₂ heaters. That needs to be cut apart. If you cut through the crimp with a Dremel you can avoid having to try to strip the wires to reattach later. There might not be enough wire to do that without difficulty.

You cannot determine which of the wires is shorted when they are all connected.

__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)