Drink Rail Adapter Kit Installation Instructions The Vista Drink Rail Adapter is designed to fit over the Vista Aluminum Railing Systems. Step (1) Measure distance from snd post to end post including post sleeve and cut Rail Adapter to length as needed (soe fig. 1 ¢ 8.1) Length “Adapter Fig. 1 Step (2) Fasten Drink Rail Adapter to top rail using # 10 x 3/4" PH Tory Tek screws provided placing through prevailed holes attempting sides. Dus to length TTT variations ring additional holes ~~ ~~ maybe required.