Datajack not needed, you can plug directly into the control rig.
Depend on your reading if control rig provide you with DNI or not i guess.
(to enter VR you need DNI and a sim-module)
"There’s a list of things you need to have in order to jump into a device: you have to have three marks on the device you want to jump into, you have to be in VR, the device you want to jump into has to have a rigger adaptation, and you have to have a control rig"
"Direct neural interface (along with a sim module) is required for VR use"
"You get DNI by wearing trodes, or having an implanted datajack, commlink, or cyberdeck"
"Control rig ... has a built-in sim module"
"A sim module must be accessed via a direct neural interface (trodes, datajack, or implanted commlink)."
"Sim modules are a must-have for virtual reality of sorts, including VR clubs, VR games, simsense, and darker virtual pleasures."
"Rigger interface: When added to a vehicle, this lets you use a control rig to jump in and control it directly through immersive virtual reality"