Donna, Donna, donn'a mispel bidlge!
Second pump, it any, is possibly under the vee/forward berth. If your hull shape is like ours, the narrower, forward part of the boat is deeper even as the keel rises toward the bow. Quite possibly, it would pump into the main bilge sump; you'd see a hose ending in the sump that begins at the other pump.
On our sailboat, I wired the forward pump to come on when the main pump was switched on both automatically and manually. Otherwise, there was never enough water to switch on that pump, but plenty to smell.