I dont know what thread type u have there , thats why i say stick to bsp cause u can easily get compatable bits local .
perhaps bring your tank connector to a goo hydraulic or tool place in your locality and they might ID the thread for u and find u a cap . Otherwise get the bsp one off amazon .
As for the wet vac , connecting it to your side port on enforcer ? would probably lower overall lift .
and besides ... u have a booster