Same thing for both my 81 4/4 and 86 Plus 8. Turn indicators in the front holes and blanked off holes when I removed the rear bumpers. No bumpers now, just over riders on both cars. Not sure what the Canadian rules are, but this is OK in the US.
Cheers.

Attached Images
27 Nov 2013 (C).jpg (111.87 KB, 114 downloads)
86 Plus 8
Braunstein's 81 4 4_C.JPG (48.82 KB, 115 downloads)
81 4/4
Mark

1934 SS MX4
1938 Series 1 DHC
1951 Plus 4
2005 Roadster