Yes, the entries on Form 8606 are correct and you will have the basis on line 14 of $610 that will be carried forward.
The $210 would be like earnings in the IRA. You only enter the $7,000 as the nondeductible traditional IRA contribution. Then the $6,390 as converted (I assume this included the $210) and you will have the $610 basis carried over to future years.
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