So I couldn't add anymore pics on the same post but got the stock Toyota lock from amazon and everything is plug and play, no drilling and cutting, just had to remove the gate's screws and tie strapped the harness.
TOYOTA Genuine 2019 & Newer Tacoma Short Wheelbase Tailgate Lock (PK3B6-35JS0) https://www.amazon.com/dp/B07ZL2WCLD/ref=cm_sw_r_wa_apa_i_BxxyEbG1HGV2A
Added the OEM tailgate lock for $160 and an afternoon.
https://smile.amazon.com/TOYOTA-Genuine-Wheelbase-Tailgate-PK3B6-35JS0/dp/B07ZL2WCLD