How about using your last feeder connection along the buss line ?
Would it be okay to " dead end " the wire inside the IDC connector.
Yes, you can end the bus wires at a scotchlok IDC connector that connects the last track drop feeder to the DCC bus.
But be aware that part of the IDC connector requires that the wire insulation actually extends a littler bit past the connector body in order to ensure that the wire remains straight inside the connector.
DonV