McIntosh Ma6100 pre main jumper width?


Hi,
Would anyone know off hand the width of the pre main u shaped jumper used on the 6100?

Currently jus using rca cable but would like to go bsck to the oem setup.

Mine right now is hard to get at to measure and would save me some crawling around.

Tried McIntosh and was told NLA.
TIA






escorial