Anyone else working with Turing as a contractor?

Recently I got an offer from Turing for LLM Data scientist role as an contractor and I will be working with one of the best company in USA but as Turing is type of middle man, so I am confused now whether the contract will end once the client company ends contract with Turing or I will be shifted to another company for work? I am confused and they also told that I will have 2 week of trial period but nothing as such is mentioned I'm the contract and I am still working at current company and yet to serve 15 days of notice period which they told I can serve while working part time after trial period, so has anyone have idea that is there any trial period? And does anyone else have got offer? Which has joining date of 30th September?? And what about the security?