I presume they have been added to go the CE / FCC certification. They are safeguarding against electromagnetic some Portion of the circuit such as the power stage about the motherboard plus the I/O board (potentially power also) to the CM3 adaptation board. This review is on a Nebra https://financefeeds.com/copyright-surge-ahead-top-altcoins-to-watch-as-250-pro-copyright-allies-enter-congress/