MEAN WELL DC-PLUG-R7BF-P1J DC Plug Adapter 4P DIN Socket (R7B) -- 2.1mm Plug (P1J-11mm) - Max 6A rating

Power Source WC14-C-4RF-SO Low Voltage Connector 4 Way Male 5A 4-7mm OD IP68 Solder Terminals

MEAN WELL DC-PLUG-P1J-P1M DC Plug Adapter 2.1mm Socket (P1J) -- 2.5mm Plug (P1M-11mm) - Max 6A rating

POWER SOURCE WB1-SC Connector Cable Box 11.5mm OD IP68

POWER SOURCE WB4-SC 4-Way Connector Cable Box 40A 9-12mm OD IP68

POWER SOURCE PLDC-P1JS-SCT DC Adapter 2.1/5.5mm Socket -- Screw Terminals

POWER SOURCE PLDC-P1MS-SCT DC Adapter 2.5/5.5mm Socket -- Screw Terminals