Auto vaccum cleaner

[steq184]

Hello
I have an above ground pool and want to use an auto vacuum cleaner, at the moment I use the normal hand vacuum that I plug into the skimmer by using an adaptor.
Firstly can I use the auto cleaner by cutting in a t piece to the skimmers pipe and inserting a tap so I can turn on and off the suction without having to keep removing the skimmer adaptor.
Secondly by using this tap and leaving the skimmer open would this reduce the suction on the auto cleaner?
Thanks for any advice on this matter.