Thank you for the replies my friends.
Now that I have cut the loom to shorten and reorganize it, I know where the lead cable of the pump is on the front part, so I will install the inertia switch under the scuttle or on the bulkhead, it will be safer and easier. So I reconnected the in-tank pump directly to the lead cable, and will insert he inertia switch in the front.
Thanks for the help