The connectors we use can be found below:
- Motors: Ningbo Kangnex Elec|Ningbo Kangnex Elec WJ2EDGK-5.08-4P|Pluggable System Terminal Block|LCSC
- Power: Ningbo Kangnex Elec|Ningbo Kangnex Elec WJ2EDGK-5.08-2P|Pluggable System Terminal Block|LCSC
- Limit switches: Ningbo Kangnex Elec|Ningbo Kangnex Elec WJ15EDGK-3.81-5P|Pluggable System Terminal Block|LCSC
- Other connections: Ningbo Kangnex Elec|Ningbo Kangnex Elec WJ15EDGK-3.81-2P|Pluggable System Terminal Block|LCSC
As @CRD mentioned, you should be able to get them from a variety of manufacturers like Digikey, Wurth, etc. since they’re very standard terminal block connectors 