activating teensy 4.1 bootloader mode if teensy is in enclosure?

From code you can do:

asm("bkpt #251"); // run bootloader

or add your own pushbutton to momentarily connect the "Program" pin on the T4.1 to ground
 
Thank you. It seems that pin is behind the SD card

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I currently have the teensy in a box on a termination block

https://www.amazon.com/gp/product/B09NXYWYK7/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

so that pin is not really accessible from one of the wire terminals. I guess I'll have to do some soldering.
 
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