Park one of these between a TMC2130 or TMC5160 stepper driver and a 3D-printer control board to bring out the SPI bus used to configure the driver for other purposes (like a thermocouple or RTD digital converter). Use any other free digital I/O pin as CS for your add-on SPI peripheral.

The "horizontal" project is laid out to work with the SKR 1.4 Turbo and similar boards. The "vertical" project is laid out to work with the SKR Pro boards, where the drivers are turned 90° and need a different layout.

No BOM provided; all you need are 18 pins' worth of sockets that will hold the driver boards' pins on one side and long pins on the other side that will extend through the board and into the socket on your printer's control board. Something like the Samtec SSQ-10x-03-G-S (two with 8 pins, one with 2) would probably work.