How to connect to the BMC serial interface in a pinch

Parts needed:

A null modem cable (9-pin DE9)
A second machine with a serial port or USB to serial adapter (RS232 style, NOT a TTL UART dongle)
3 jumper wires with female 2.54mm sockets on one end (Sold variously as "breadboard" or "prototyping" wires)

Jumper wire preparation

Trim the socketless end of the jumper wires and strip the insulation back by 1cm (TODO verify) or so.
For each wire, fold the end of the stripped wire over itself slightly as depicted. This will be used as a makeshift spring contact.
Insert the prepared bare ends of the jumpers into pins 2 (RxD), 3 (TxD), and 5 (GND) of one end of the null modem cable. (The pin numbers are stamped next to each female socket on the plastic shell. Use a magnifying glass and/or bright light to identify.)
Connect the female ends of the jumpers to the BMC serial socket. (TODO verify table)

Connect the other end of the null modem cable to your second machine and set your terminal software for 115200 8N1, no flow control.

Completed improvised BMC connection