MQ-7 Heater Modification for ESPHome

I am struggling with the size of SMD components. My fingers are too big and shaky.
I can cope with through-hole components OK.

I am having trouble with the MQ-7 board modification.
(MQ-7 Carbon Monoxide Sensor |
It would be easier for me to build my own from scratch.
Does anyone have the circuit diagram of the modified board?