Hi,
This is the schematics of TWR-PROTO:
https://www.nxp.com.cn/downloads/en/schematics/SCH-26187.pdf
The TWR-ELEV board can connect the primary side signals of TWR-K70F120M to the TWR-PROTO board.
If you do not want to use TWR-ELEV, pls refer to the schematics of TWR-K70F120M and check if you can connect the signals of TWR-K70F120M to the TWR-PROTO board, in other words, if the signals on TWR-K70F120M board you want to connect to are connected to a connector on the TWR-K70F120M board so that you can use flying cable to connect them. so it is case by case.
Hope it can help you
BR
XiangJun Rong