Unknown wiring schematic symbol?

Here is a shot from the fortin evo-all wiring schematic that was provided for a 2015 chevrolet spark, the circled area of the picture has a symbol that I have not been able to identify. Anyone? The symbol below it shows to cut the wire and i believe it means to replace the original wires path to a new one, But the circled symbol does not show the cut being made, but still has the same symbol of a black dot with a strike through line.

The symbol is a splice. The immobilizer power wire is cut. COMM1 (D6) and NC1 (D4) on the evo-all allow the circuit to be interrupted during remote start. Guessing the red/blue (A9) is an input into the evo-all.

Ok, so the d6 wire is cut and instead of the original 12v power supply that is normally fed to it will now be fed from the evo-all instead? and what about the d4 wire? It looks to me like the d4 wire connection is just the white/green wire from the red plug ran to the red/blue 20pin plug on the other side of the evo-all? Is that correct?   This is the only area of the schematic that is unclear to me for some reason.

The D4 (& A9) wire connects to the immobilizer power wire (vehicle side). The D6 wire connects to the immobilizer power wire (device side). The evo-all interrupts the circuit powering the immobilizer through the COMM1 and NC1.