Did you look in the 1970 Mustang body assembly manual? There are installation pictures on Ford drawing numbers NO-500-2 and NO-500-3.
For future reference, the "Ford Assembly Manual" drawing numbers use a number in the second position, not a letter, so it not a N
O (the letter "O"), it's a N
0 the number 0 (a zero). This is VERY important in using any search feature, like in this forum, or any where on the internet (like e-bay). This numeric "thing" also applies to Ford engineering part numbers and Ford service stock numbers - examples "C6ZF-9510-C" (a 1966 Mustang 289HP carburetor) or "D0OF-12127-AA" (a 1970 distributor for a 429 4V CJ originally used on a 1970 Fairlane - the 0 - a zero and the letter "O", but also used on a Mustang).
To help in your search on this forum, look in the Library under topic "Mustang Hardware Spreadsheet 69-70". You will find two files, one identified by "AP06.xlsx" (it's by "Application", aka where the part is used, the 06 is the revision) and a second by Ford part number- "PN06.xslx".
Jim