The 70C we speak of is kind of shorthand for the BM170C, not two different RV!
I like the interactive parts drawings here for finding what I bought:
https://catalog3d.winnebagoind.com/menu/Parts.htm
It takes some play for the learning curve to kick in but it can do all kinds of good stuff for newer owners as we can look through walls as well as get parts number or names for what we find!
Or if we know the name we can click on it in the list at right to make it flash yellow on the drawing as a way to spot smaller items. Things like coax splitters can be hard to spot if we have no idea where it is hidden!
https://catalog3d.winnebagoind.com/menu/Parts.htm
Click this snip or go direct?
Go to RV , then electrical and 12 volt and find interior view at top left of drawing set?
Looks like almost against the drivers side wall, just in front of the wheel well and near the floor! From inside it shows possibly lined up just to the front of the chassis fuses?
__________________
Richard
Why no RV year, make and floorplan on MY signature as we suggest for others?
I currently DO NOT have one!