Well that specific factbox is Page 193. Below is every object within incoming in the name.
;Table;130;;Incoming Document;;Application;;Platform
;Table;131;;Incoming Documents Setup;;Application;;Platform
;Table;132;;Incoming Document Approver;;Application;;Platform
;Table;133;;Incoming Document Attachment;;Application;;Platform
;Page;189;;Incoming Document;;Application;;Platform
;Page;190;;Incoming Documents;;Application;;Platform
;Page;191;;Incoming Documents Setup;;Application;;Platform
;Page;192;;Incoming Document Approvers;;Application;;Platform
;Page;193;;Incoming Doc. Attach. FactBox;;Application;;Platform
;Page;194;;Incoming Document Attachments;;Application;;Platform
;Page;1626;;Office OCR Incoming Documents;;Application;;Platform
;Page;2122;;O365 Incoming Doc. Attch. List;;Application;;Platform
;Page;2123;;O365 Incoming Doc. Att. Pict.;;Application;;Platform
;Codeunit;132;;Release Incoming Document;;Application;;Platform
;Codeunit;133;;Send Incoming Document to OCR;;Application;;Platform
;Codeunit;1216;;Incoming Doc. with Data. Exch.;;Application;;Platform
;Codeunit;1217;;Pre-map Incoming Purch. Doc;;Application;;Platform
;Codeunit;1218;;Map Incoming Doc to Purch Doc;;Application;;Platform
;Codeunit;1224;;Map Incoming Doc to Gen. Line;;Application;;Platform