Haydn's concert in G major?

Concert in g major from Haydn?
Heeey,

I play the 4th violin concert from haydn: the concert in g major.
Ive got a little problem, at the fourth page after molto allergando, i
don't know where to start. I've listened it very much on youtube, but
i can't hear it. Can anybody help me?

To watch the music sheet use this link:
imslp.org/wiki/Violin_Concerto,_Hob.VIIa… then click on violin part.

many thanks!!
here is the full link :P
http://imslp.org/wiki/Violin_Concerto,_Hob.VIIa:4,_G_major_(Haydn,_Joseph)