5 hours! you must be insane!
They don't look for Jet handling skills, you have none! (i guess)
you need to brush up on some general handling if you have not been flying much, steep turns, intercepting a radial, holding a heading and altitude with adjusting speed and thats about it, if they can do the PFD in the 6 pack layout then you want that as thats how it is done in the assessment as you are not used to PFD ND display, treat is as a seneca with a bit more speed.
Give solid support to your sim partner as CRM is a massive thing in Jets, don't try to make him look not as good as you by pointing out mistakes in a "I know all" way, just give positive support when needed.
A couple of hours is all I would recommend to do, and keep it quite, or they will be expecting a lot more of you.
p.s. make sure you can do a QDM.