A number of other players at Headingley are expected to sign new deals, following South African Wentzel's example, and new signings are also expected to be announced soon.
"For once Leeds have said they are going to make a stand," added Wentzel. "They have a two-year plan and regardless of the division we are in we will sign up the players we want.
"I've said it in the past, Northampton and Harlequins kept their best players [when they were relegated] and look where they are now.
"That's what Leeds needed to do and that's what they are going to do now. We can't wait to sign new players or give players here new contracts in April, it's too late then.
"You have to sign your players up early and keep your squad and mostly importantly sign your young players up early or others will take them off you.
"We are now signing these guys up early and that's great."
BBC Radio Leeds has commentary of Leeds Carnegie against Newcastle Falcons on 774 AM, DAB and online at bbc.co.uk/leeds on Sunday from 1700 GMT.
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