、。
I'll contact you tomorrow and we'll set up a time.
Literal
Tomorrow you [to-に] honorable-contact do, time [object-を] decide [nominalizer-こと] [dative-に] do [polite-ます].
ご連絡する is humble form (ご-prefix + する, used with Sino-Japanese verbal nouns). ~ことにする ('decide to do X') is a personal-decision pattern, distinct from ~ことになる ('it comes to be X,' which is passive/circumstantial). The speaker actively commits to a two-step action: contact, then decide.