Typo3 get content from another Extension - typo3

Question

I had an extension called "mbl_newsevent" that work with tt_news. The newsevent ext has his own TS and generates a register button on every news if i enable it. Now the newesevent ext generates a button with a url that contains the current tt_news id.
TS config part:
plugin.tt_news.mbl_newsevent {
registrationLink_typolink {
title.data = LLL:EXT:mbl_newsevent/locallang.xml:registerLinkLabel
parameter = {$powermail.plugin.pid}
parameter.override.field = tx_mblnewsevent_regurl
additionalParams.field = uid
additionalParams.intval = 1
additionalParams.wrap = &tx_powermail_pi1[eventUid]=|
#this returns the correct ID of tt_news for example 99
}
}
But now i need this eventUid in another location of my basic TS. I need this eventUid for my second menu as a parameter
Basic TS:
2 = TMENU
2 {
wrap = <ul class="naviMainLevel2"> | </ul>
NO {
wrapItemAndSub = <li> | </li>
}
ACT = 1
ACT {
wrapItemAndSub = <li class="active"> | </li>
additionalParams.data = GP:tx_ttnews|tt_news
additionalParams.intval = 1
#Here is the part where i need the id from tt_news.mbl_newsevent
#atm it returns &tx_events_pi1[newsUid]=0 correct id would be for example 99
additionalParams.wrap = &tx_events_pi1[newsUid]=|
}
CUR = 1
CUR < .ACT
}
How can i access to another Database (Extension) to get the same id?
temp.xyz = RECORDS
temp.xyz {
tables = tt_news.mbl_newsevent
...
}