This is the type of adapter you require on a Sky/Freesat Mk4 dish - If you have a different Sky disk you need to establish what Mark number and get the appropriate adapterCode:https://www.amazon.co.uk/SKY-DISH-MK4-HOLDER-ADAPTER/dp/B00FX7QAPE
Although out of stock at Amazon
Mk1.Mk2, Mk3 40m adapter.Code:https://www.amazon.co.uk/kenable-Adapter-MK1-MK3-Dishes-Clamp/dp/B007JIRDGK
The Mk4 dish will have a spirit level just in front of the LNB whereas the earlier ones don't - photo ... (note1 satcure no longer trade)
http://www.satcure.co.uk/tech/LNBpics.htm
The number of channels - go for unicable IIAlso what's the difference between Unicable 1 lnb and Unicable 2 lnb?
Thanks
See (post #2) in the following link
https://www.world-of-satellite.com/s...using-Unicable
For reference only (note 2 old page so unicable not mentioned)
Oval LNB apature
http://www.satcure.co.uk/tech/lnb.htm#oval