Connector with unique leads

We have a unique connector with flat leads, i.e. the leads leave the connector body flat parallel to the pads. The leads are without a heel, they are flush with the connector body. Moreover, one can't solder beneath the connector because the leads are sunk into a channel. In such configuration, what is the ability to comply with class 3 of IPC 610? The main issue as we understand is the heel height.

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