Nixie Clock IN-17 Assembly Instructions And User's Manual page 25

S1-S3 Buttons
R8, R9, R10 10kΩ
8.1. Parts S1-S3 are right-angle tactile button switches. Insert them into locations S1, S2 and S3, and
make sure that they sit flat on the board. Solder all four pins of each switch.
8.2. All resistors R8, R9 and R10 leads bend in accordance with item 3.1. Insert them into locations R8,
R9, R10 and solder their leads as pointed on the picture
8. Buttons circuit components assembly
.
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