adapting and locking mechanical finger

a mechanical robotic finger that adapts to the object it is holding hardware needed:2 3mm by 20mm springs6 2.5mm by 7.5mm self tapping screws1 2.5mm by12mm self tapping screw1 m3 tnut1 n20 m3 thread gear motor: https://www.aliexpress.com/item/1005007474764418.html?srcSns=sns_WhatsApp&spreadType=socialShare&bizType=ProductDetail&social_params=6000279852888&aff_fcid=d4622d1a20d64db3848307269692a9e2-1746289270978-00385-_opwCzyv&tt=MG&aff_fsk=_opwCzyv&aff_platform=default&sk=_opwCzyv&aff_trace_key=d4622d1a20d64db3848307269692a9e2-1746289270978-00385-_opwCzyv&shareId=6000279852888&businessType=ProductDetail&platform=AE&terminal_id=c1a5f71cbdf94baf8947e1fdb690460f&afSmartRedirect=y