Adding a # end of the dial plan

Hi Guys,

Can anyone tell what I need to do to add a # at the end of the dialed digtis: here is my current config, don’t know where to add the #. This is to let the pbx know I have finished dialing: Thx

exten => _07.,1,Set(GROUP()=TRUNK1)
exten => _07.,2,GotoIf($[${GROUP_COUNT()} > -2 ]?102)
exten => _07.,3,Dial(OH323/1198#8807831122@|60|D(ww11124580w${EXTEN}))
exten => _07.,4,Hangup()