heq5 pro and sigma 150-600mm lens dovetail help

[pob175]

I am new to astrophotography and bought an heq5 pro mount/tripod(goto) and was wondering what size phto dovetail would i need for the lsigma 150-600mm lens would i need to be sure it is secure on the tripod? sry for the newb question. Any help/advice would be appreciated.  Thank you for your time.

Edited July 2, 2020 by pob175

[PeterCPC]

Something like this should do. Or just any vixen dovetail that you can fix the lens foot to.

Peter