Electronic unit attaching structure

An electronic unit attaching structure comprising:

• an electronic unit having a plurality of connector connection portions;
• and an electronic unit attachment having a plurality of connectors correspond to the plurality of the connector connection portions,
• the electronic unit attaching structure being configured to allow first connection and second connection in this order upon the electronic unit being attached to the electronic unit attachment, the first connection being a connection of first part of the plurality of the connectors with first part of the plurality of the connector connection portions, the second connection being a connection of second part of the plurality of the connectors with second part of the plurality of the connector connection portions, wherein
• the electronic unit comprises a body, the body includes at least one semiconductor device and the plurality of connector connection portions, and
• the at least one semiconductor device is configured to be electrically connected to the plurality of connectors via the plurality of connector connection portions.