rusEFI likes Tag Connect so many boards have that small TC2030 footprint - microRusEFI, Hellen, Proteus and wideband etc.

TC2030-CTX-NL-STDC14 cable (old part number: TC2030-CTX-NL-STDC14)

$43.00 at [https://www.tag-connect.com/product/tc2030-ctx-nl-stdc14-for-use-with-stm32-processors-with-stlink-v3](https://www.tag-connect.com/product/tc2030-ctx-nl-stdc14-for-use-with-stm32-processors-with-stlink-v3)

and STLINK-V3MINI $11 everywhere is the easiest to use combo.


![x](Images/tc2030-stlink-v3.jpg)


Way more ghetto option would be

![x](Hardware/microRusEFI/TC2030_SWD.jpg)


![x](Hardware/tc2030.png)

Four more important wires are:

* GND
* 13-swdio
* 14-swclk

Offtopic:
STLINK-V3MINI also works with FTSH-105-01-F-DV-007-K on Proteus