：。
Confirming the venue: let either the person themselves or their chaperone scout out the omiai location beforehand.
Literal
Place [attributive-の] confirmation: matchmaking [attributive-の] place [object-を] person-themselves [or-か] chaperone [subject-が] preliminary-inspection [object-を] do-[preparatory-ておく][volitional-ましょう].
Guidance from an omiai (arranged-introduction) manual. 見合い ('omiai') is the traditional Japanese arranged meeting between potential marriage partners, typically overseen by a go-between. 付き添い人 ('chaperone') is the person who accompanies a participant to the meeting — historically a parent or the go-between. 下見 ('preliminary inspection, scouting') is the standard word for checking a location in advance. ~ておく ('to do X in preparation') reinforces the preparatory nature. ~ましょう is the volitional/suggestive 'let's / should.'