# Tether connecting top side

**URL:** <https://discuss.bluerobotics.com/t/tether-connecting-top-side/889>\
**Category:** Blue Robotics Software\
**Created:** [March 31, 2017, 3:12am UTC](https://discuss.bluerobotics.com/t/tether-connecting-top-side/889 "2017-03-31T03:12:24Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![julesh](https://avatars.discourse-cdn.com/v4/letter/j/aca169/32.png) [@julesh](https://discuss.bluerobotics.com/u/julesh)\
**Post date:** [March 31, 2017, 3:12am UTC](https://discuss.bluerobotics.com/t/tether-connecting-top-side/889/1 "2017-03-31T03:12:24Z")

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Hi

This is going to seem a dumb question but, the tether connects to the Fathom X interface board on the sub by white positive, blue negative.

Is it exactly the same connection topside?

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**Author:** ![adam](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/adam/32/9438_2.png) [@adam](https://discuss.bluerobotics.com/u/adam)\
**Post date:** [March 31, 2017, 3:42am UTC](https://discuss.bluerobotics.com/t/tether-connecting-top-side/889/2 "2017-03-31T03:42:09Z")

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Hi Julian,

Yes, the connection polarity is the same on the topside Fathom-X.

-Adam

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**Author:** ![julesh](https://avatars.discourse-cdn.com/v4/letter/j/aca169/32.png) [@julesh](https://discuss.bluerobotics.com/u/julesh)\
**Post date:** [March 31, 2017, 3:51am UTC](https://discuss.bluerobotics.com/t/tether-connecting-top-side/889/3 "2017-03-31T03:51:31Z")

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Thanks Adam

Regards Julian