1

Bolt for mounting flasher unit. Early TR3As had a flasher with mounting tab at top. Late TR3As used a clamp strap over a standard flasher unit.

2

Fuse block mounting hole

3

Windscreen washer hose pass through. Or 1/2 inch rubber plug

4

Holes for mounting voltage regulator

5

Two brass build plates. Each plate screwed on and painted body colour.

6

Hole for top heater mounting stud. Also used to anchor brake line.

7

Oil pressure gauge tube pass through hole

8

Battery ground strap mounting point. Remember there must be good electrical contact here. Clean paint off from around hole and use a star washer between wire end and body.

9

Clamp point for oil pressure gauge line

10

Holes for mounting steering column steady bracket

11

Speedometer cable pass through

12

Windscreen wiper cable pass through

13

Wiper motor mounting holes.

14

Wiring harness pass through

15

Heater hose pass through

15A

Clamp for clutch hydraulic line

15B

Clamp for oil pressure gauge line on early cars, not on late TR3As

16

Steering column pass through

17

Tach cable pass through

18

Temperature gauge line pass through

19

Clamp point for speedometer and windscreen washer tube

20

Top hole for wire harness. Lower hose has 1 inch plug

21

Mounting holes for solenoid

22

Exit for the scuttle vent drain tube

23

Choke cable pass through

24

Rectangular hole. 1/4 inch plug

25

Commission plate has two mounting holes for pop rivets. Additionally there may be a second pair of holes if the car was provided with a year plate. A year plate in normally orange and has "STC - XY" where STC stands for Standard Triumph Company and XY are the last two digits of the year. These year plates converted a unsold, unused Triumph into the next model year.